I noted some bugs in Trados Studio that persist for very long and are not corrected with numerous updates.
For example, from the very beginning of Trados Studio 2021 you can't copy-paste from Concordance Search into the translation—all the context menu commands of the selected text just do not work, as well as keyboard commands.
Or—another example—you can't open a file after it has been prepared for translation: you need to close Trados Studio and restart it again. This bug remains in all Trados Studio versions (2017, 2019, 2021).
Where can users report of them? It's not obvious. I do not know and many users too, I am sure.