This is happening since years in Shotcut CATALAN language, in all versions in Windows. Altough is not a major problem, seems an easy fixing bug:
When I export a file, i write the name in the little folder explorer popup, and when the file is exported, there’s an add in the filename by default that says “);Tots”… Whichs might be part of the h-over info “)Tots els fitxers” >> “(All files)” in English or something like this.
Example of the resultant filename: Work Songs in Texas Prision.mp4);Tots
I guess there’s a character in the translation file that messes it up.
I have to change the extension each time I export a video.