I'm posting this issue because this issue that was present since some times in LMMS and was thought fixed https://github.com/LMMS/lmms/issues/3886 still exists the steps to reproduce this bug are pretty easy : - Starting LMMS on Ubuntu (this bug also exists on the stable 1.1.3 build) - Adding a ZynAddSubFX track to the project - Creating a new bank screenshot of the issue : 