Bluetooth shows devices but can't connect

[mast3rmindx]

Describe the bug
Bluetooth can be enabled and can scan for available devices but doesn't seem to be able to connect for some reason. Also it doesn't give a connection error message so I'm not sure of the issue.

Device

• macOS Version: 11.5.1
• EFI Version: 1.5.1
• EFI type (regular or HeliPort): HeliPort

[valnoxy]

Hey! 👋
Does the issue still appear in Version 1.5.2?

[mast3rmindx]

Yes

[iampcfox]

os: big sur 11.5.1
I have the same problem.
I use bluetooth earphone but it can not connect, and try to connect my phone but it is intermittently.
no matter I use folder EFI-bigsur or EFI-HeliPort settings.

especially, the network speed is so slow (or disable?) when use EFI-HeliPort settings

[techdevmaestro]

try to

Intel WiFi/Bluetooth
OpenCore 0.7.8
Thinkpad T440p
The fix was:
UEFI -> ProtocolOverrides -> HashServices -> true
simprecicchiani/ThinkPad-T460s-macOS-OpenCore#150 (comment)
no issues after going sleep