System Information
Operating system: Windows-8.1-6.3.9600-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 465.89
Blender Version
Broken: version: 3.0.0 Alpha, branch: cycles-x, commit date: 2021-04-23 13:56, hash: rB1dea1d93d39a
Worked: (newest version of Blender that worked as expected)
Short description of error
The same bug can be found starting from the 2.8 version, doesn't happen on the 2.79. doesnt happen when you select bones on the Timeline instead of the dopesheet
Exact steps for others to reproduce the error
select a few bones to easily highlight bones in the dopesheet
head to dopesheet
click on a keyframe
all bones deselected