diff --git a/changelog.txt b/changelog.txt
index e1e4e3fb9..c8834318e 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -21,6 +21,7 @@ Fixed
 +++++
 
 - Bumped ``isort`` to 5.12.0 in the pre-commit configuration file (#715).
+- Fixed bundle status information not being correctly read for subclasses of ``FlowProject`` (#718, #720).
 
 Removed
 +++++++
diff --git a/contributors.yaml b/contributors.yaml
index 821a5d0c6..10567c111 100644
--- a/contributors.yaml
+++ b/contributors.yaml
@@ -171,4 +171,9 @@ contributors:
     given-names: Melody
     orcid: "https://orcid.org/0000-0001-9788-9958"
     affiliation: "University of Michigan"
+  -
+    family-names: Puchala
+    given-names: Brian
+    orcid: "https://orcid.org/0000-0002-2461-6614"
+    affiliation: "University of Michigan"
 ...
diff --git a/flow/project.py b/flow/project.py
index f211b02a7..b0e3ee4b1 100644
--- a/flow/project.py
+++ b/flow/project.py
@@ -2126,6 +2126,11 @@ def _fn_bundle(self, bundle_id):
         """Return the canonical name to store bundle information."""
         return os.path.join(self.path, ".bundles", bundle_id)
 
+    @property
+    def _bundle_prefix(self):
+        sep = getattr(self._environment, "JOB_ID_SEPARATOR", "/")
+        return f"{self.__class__.__name__}{sep}bundle{sep}"
+
     def _store_bundled(self, operations):
         """Store operation-ids as part of a bundle and return bundle id.
 
@@ -2148,9 +2153,8 @@ def _store_bundled(self, operations):
         """
         if len(operations) == 1:
             return operations[0].id
-        sep = getattr(self._environment, "JOB_ID_SEPARATOR", "/")
         _id = sha1(".".join(op.id for op in operations).encode("utf-8")).hexdigest()
-        bundle_id = f"{self.__class__.__name__}{sep}bundle{sep}{_id}"
+        bundle_id = self._bundle_prefix + _id
         fn_bundle = self._fn_bundle(bundle_id)
         os.makedirs(os.path.dirname(fn_bundle), exist_ok=True)
         with open(fn_bundle, "w") as file:
@@ -2160,10 +2164,9 @@ def _store_bundled(self, operations):
 
     def _expand_bundled_jobs(self, scheduler_jobs):
         """Expand jobs which were submitted as part of a bundle."""
-        sep = getattr(self._environment, "JOB_ID_SEPARATOR", "/")
-        bundle_prefix = f"{self}{sep}bundle{sep}"
         if scheduler_jobs is None:
             return
+        bundle_prefix = self._bundle_prefix
         for job in scheduler_jobs:
             if job.name().startswith(bundle_prefix):
                 with open(self._fn_bundle(job.name())) as file: