[MU4 Issue] Crash with Vinyl VST plugin

[abariska]

Describe the bug After some manipulations with Vinyl MU4 is crashed (see first part of video) When changing some settings on Vinyl and saving score than the score can't be opened again (crashed without any notifications)

To Reproduce Steps to reproduce the behavior:

1. Open any score and assign Vinyl VST to the master track
2. Open the plugin and raise the Scratch amount
3. Move Gain of the Scratch to 100% and unclick the mouse button
4. Move the Gain of the Scratch to 0
5. If no crash repeat the same

OR try to open this score with saved Vinyl inside (see second part of video) 97117 MU4.mscz.zip

Expected behavior No crash when using Vinyl VST plugin

Screenshots

https://user-images.githubusercontent.com/101250347/183436150-efcd9b09-d0ae-40b6-93cf-7faabb6420b4.mov

Platform information

• OS: [e.g. macOS, Windows, Linux]