diff --git a/CHANGELOG.md b/CHANGELOG.md
index e6a0630718d5..4038d344a0ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -83,6 +83,10 @@ Main (unreleased)
 
 - Fix `ResolveEndpointV2 not found` for AWS-related components. (@hainenber)
 
+- Fix bug where custom headers were not actually being set in loki client. (@captncraig)
+
+- Fix `ResolveEndpointV2 not found` for AWS-related components. (@hainenber)
+
 ### Other changes
 
 - Removed support for Windows 2012 in line with Microsoft end of life. (@mattdurham)
diff --git a/component/loki/write/write.go b/component/loki/write/write.go
index 65fd04c6f692..5ef5cf864888 100644
--- a/component/loki/write/write.go
+++ b/component/loki/write/write.go
@@ -160,12 +160,14 @@ func (c *Component) Update(args component.Arguments) error {
 	}
 
 	cfgs := newArgs.convertClientConfigs()
+
 	uid := agentseed.Get().UID
-	for _, cfg := range cfgs {
-		if cfg.Headers == nil {
-			cfg.Headers = map[string]string{}
+	for i := range cfgs {
+		//cfgs is slice of struct values, so we set by index
+		if cfgs[i].Headers == nil {
+			cfgs[i].Headers = map[string]string{}
 		}
-		cfg.Headers[agentseed.HeaderName] = uid
+		cfgs[i].Headers[agentseed.HeaderName] = uid
 	}
 	walCfg := wal.Config{
 		Enabled:       newArgs.WAL.Enabled,
diff --git a/component/pyroscope/scrape/scrape.go b/component/pyroscope/scrape/scrape.go
index bf84c1567e4f..5f4b1f18e19c 100644
--- a/component/pyroscope/scrape/scrape.go
+++ b/component/pyroscope/scrape/scrape.go
@@ -193,7 +193,7 @@ func NewDefaultArguments() Arguments {
 		Scheme:           "http",
 		HTTPClientConfig: component_config.DefaultHTTPClientConfig,
 		ScrapeInterval:   15 * time.Second,
-		ScrapeTimeout:    15*time.Second + (3 * time.Second),
+		ScrapeTimeout:    10 * time.Second,
 		ProfilingConfig:  DefaultProfilingConfig,
 	}
 }
@@ -205,16 +205,16 @@ func (arg *Arguments) SetToDefault() {
 
 // Validate implements river.Validator.
 func (arg *Arguments) Validate() error {
-	if arg.ScrapeTimeout <= 0 {
+	if arg.ScrapeTimeout.Seconds() <= 0 {
 		return fmt.Errorf("scrape_timeout must be greater than 0")
 	}
-	if arg.ScrapeTimeout <= arg.ScrapeInterval {
-		return fmt.Errorf("scrape_timeout must be greater than scrape_interval")
-	}
 
-	if cfg, ok := arg.ProfilingConfig.ProcessCPU, true; ok {
-		if cfg.Enabled && arg.ScrapeTimeout < time.Second*2 {
-			return fmt.Errorf("%v scrape_timeout must be at least 2 seconds", pprofProcessCPU)
+	// ScrapeInterval must be at least 2 seconds, because if
+	// ProfilingTarget.Delta is true the ScrapeInterval - 1s is propagated in
+	// the `seconds` parameter and it must be >= 1.
+	for _, target := range arg.ProfilingConfig.AllTargets() {
+		if target.Enabled && target.Delta && arg.ScrapeInterval.Seconds() < 2 {
+			return fmt.Errorf("scrape_interval must be at least 2 seconds when using delta profiling")
 		}
 	}
 
diff --git a/component/pyroscope/scrape/scrape_loop.go b/component/pyroscope/scrape/scrape_loop.go
index a1f7d2a6c1b7..76eb93dd1ffb 100644
--- a/component/pyroscope/scrape/scrape_loop.go
+++ b/component/pyroscope/scrape/scrape_loop.go
@@ -174,6 +174,13 @@ type scrapeLoop struct {
 }
 
 func newScrapeLoop(t *Target, scrapeClient *http.Client, appendable pyroscope.Appendable, interval, timeout time.Duration, logger log.Logger) *scrapeLoop {
+	// if the URL parameter have a seconds parameter, then the collection will
+	// take at least scrape_duration - 1 second, as the HTTP request will block
+	// until the profile is collected.
+	if t.Params().Has("seconds") {
+		timeout += interval - time.Second
+	}
+
 	return &scrapeLoop{
 		Target:       t,
 		logger:       logger,
diff --git a/component/pyroscope/scrape/scrape_loop_test.go b/component/pyroscope/scrape/scrape_loop_test.go
index 5435846e9b13..0b5b11bbfd86 100644
--- a/component/pyroscope/scrape/scrape_loop_test.go
+++ b/component/pyroscope/scrape/scrape_loop_test.go
@@ -147,7 +147,12 @@ func TestScrapePool(t *testing.T) {
 	args.ScrapeInterval = 2 * time.Second
 	p.reload(args)
 	for _, ta := range p.activeTargets {
-		require.Equal(t, 1*time.Second, ta.timeout)
+		if paramsSeconds := ta.params.Get("seconds"); paramsSeconds != "" {
+			// if the param is set timeout includes interval - 1s
+			require.Equal(t, 2*time.Second, ta.timeout)
+		} else {
+			require.Equal(t, 1*time.Second, ta.timeout)
+		}
 		require.Equal(t, 2*time.Second, ta.interval)
 	}
 }
diff --git a/component/pyroscope/scrape/scrape_test.go b/component/pyroscope/scrape/scrape_test.go
index 1ba6a1515e44..e6e07a0aeb81 100644
--- a/component/pyroscope/scrape/scrape_test.go
+++ b/component/pyroscope/scrape/scrape_test.go
@@ -142,30 +142,40 @@ func TestUnmarshalConfig(t *testing.T) {
 				return r
 			},
 		},
-		"invalid cpu timeout": {
+		"invalid cpu scrape_interval": {
 			in: `
 			targets    = []
 			forward_to = null
 			scrape_timeout = "1s"
 			scrape_interval = "0.5s"
 			`,
-			expectedErr: "process_cpu scrape_timeout must be at least 2 seconds",
+			expectedErr: "scrape_interval must be at least 2 seconds when using delta profiling",
 		},
-		"invalid timeout/interval": {
+		"allow short scrape_intervals without delta": {
 			in: `
 			targets    = []
 			forward_to = null
-			scrape_timeout = "4s"
-			scrape_interval = "5s"
+			scrape_interval = "0.5s"
+			profiling_config {
+				profile.process_cpu {
+					enabled = false
+				}
+		   }
 			`,
-			expectedErr: "scrape_timeout must be greater than scrape_interval",
+			expected: func() Arguments {
+				r := NewDefaultArguments()
+				r.Targets = make([]discovery.Target, 0)
+				r.ScrapeInterval = 500 * time.Millisecond
+				r.ProfilingConfig.ProcessCPU.Enabled = false
+				return r
+			},
 		},
 		"invalid HTTPClientConfig": {
 			in: `
 			targets    = []
 			forward_to = null
 			scrape_timeout = "5s"
-			scrape_interval = "1s"
+			scrape_interval = "2s"
 			bearer_token = "token"
 			bearer_token_file = "/path/to/file.token"
 			`,
diff --git a/pkg/logs/logs.go b/pkg/logs/logs.go
index 118c1a75bf58..8e09e002ac91 100644
--- a/pkg/logs/logs.go
+++ b/pkg/logs/logs.go
@@ -185,11 +185,12 @@ func (i *Instance) ApplyConfig(c *InstanceConfig, g GlobalConfig, dryRun bool) e
 	}
 
 	uid := agentseed.Get().UID
-	for _, cfg := range c.ClientConfigs {
-		if cfg.Headers == nil {
-			cfg.Headers = map[string]string{}
+	for i := range c.ClientConfigs {
+		// ClientConfigs is a slice of struct, so we set values with the index
+		if c.ClientConfigs[i].Headers == nil {
+			c.ClientConfigs[i].Headers = map[string]string{}
 		}
-		cfg.Headers[agentseed.HeaderName] = uid
+		c.ClientConfigs[i].Headers[agentseed.HeaderName] = uid
 	}
 
 	clientMetrics := client.NewMetrics(i.reg)
diff --git a/pkg/metrics/instance/instance_integration_test.go b/pkg/metrics/instance/instance_integration_test.go
index 85c804a5711e..3ffa70892690 100644
--- a/pkg/metrics/instance/instance_integration_test.go
+++ b/pkg/metrics/instance/instance_integration_test.go
@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os"
 	"strings"
+	"sync"
 	"testing"
 	"time"
 
@@ -73,8 +74,15 @@ remote_write: []
 	require.NoError(t, err)
 
 	instCtx, cancel := context.WithCancel(context.Background())
-	defer cancel()
+	var wg sync.WaitGroup
+	defer func() {
+		cancel()
+		wg.Wait()
+	}()
+
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		err := inst.Run(instCtx)
 		require.NoError(t, err)
 	}()
@@ -142,8 +150,15 @@ remote_write: []
 	require.NoError(t, err)
 
 	instCtx, cancel := context.WithCancel(context.Background())
-	defer cancel()
+	var wg sync.WaitGroup
+	defer func() {
+		cancel()
+		wg.Wait()
+	}()
+
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		err := inst.Run(instCtx)
 		require.NoError(t, err)
 	}()
@@ -193,8 +208,15 @@ remote_write: []
 	require.NoError(t, err)
 
 	instCtx, cancel := context.WithCancel(context.Background())
-	defer cancel()
+	var wg sync.WaitGroup
+	defer func() {
+		cancel()
+		wg.Wait()
+	}()
+
+	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		err := inst.Run(instCtx)
 		require.NoError(t, err)
 	}()