Found this bug in the most current update version (14.6). When placing keyframes using the pen tool in the timeline, the audio keyframes seem to be a bezier type even though linear is selected for both keyframes. Not a super big issue from a functionality standpoint (doesn't really impact my workflow) but nevertheless would be nice to see it get fixed. Let me know if you have any ideas on how to workaround it currently.
Audio, Editing, Error or problem, User interface or workspaces
That has not been a solution that works for me so not sure why you are so admant it works. I am still experiencing the issue after closing and relaunching project. Even creating an entirely new project and importing the old project does not solve that issue. Furthermore, is your software really that good if your only proposed solution involves relaunching my software and disturbing my workflow?? Like come on Adobe, the last two updates have been unbelieveably buggy for me.
This is a user forum. So unless it says Adobe Employee next to someone's name you're just talking to another user like yourself. The bezier thing is a bug in 14.6 - for most people the workaround is to restart. If that doesn't work and you don't have a need to stay in 14.6, you can try rolling back to a different version of Premiere, like 14.5 if that was working for you.