Using windows 10 SC version 21.09.29. Problem always happens.
When I open SC for the first time and everytime it is a new opening, the filter button does not allow you to work the timeline filters. you must first close the filter feature and then reopen it. After that the filter access works fine. This was happening on earlier versions also.
This is not big deal as I know what is going on and I just open and close the filter function once per session. I just wanted to let you know of the bug.
What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Can you repeat the problem? If so, what are the steps?
(Please be specific and use the names as seen in Shotcut, preferably English. Include a screenshot or screen recording if you can. Also, you can attach logs from either View > Application Log or right-click a job and choose View Log.)