So I’ve been messing around with a video and out of nowhere I’ve noticed it has now two titles, the old one and a new one I’ve given it. I have tried using the header editor to edit the title but the old title always appears after the new one when im playing the video, even though it doesn’t show on the header editor.
This latter part might be the title of one of the tracks, including the video track. Another idea is to look for tags & chapters; maybe this additional thing is located somewhere there.
Those are the usual places where free-form strings can be stored in Matroska.
Tags from source files appear like other tracks in the lower list in the Multiplexer module. Just disable them & remux.
Thank you brother, it worked. I really enjoy your program!
You’re quite welcome!

