There are several issues with the selection synchronisation mechanism between pose bones and animation channels (in the dope sheet etc.). This task aims to provide an improved implementation of this sync to address these reports:
* {T48145}
* {T58718}
* {T62463}
* {T71615}
* {T73215}
@hjalti mentioned that it's probably better to synchronise less, that is, have the selections more separate. I'll talk with him, @pablico, and @Mets in the Blender studio to come up with an initial proposal, which can then be fine-tuned here.
For me the trigger to start working on this was {T62463}; in that situation it's really impossible to select certain channels.