VSTs playing random notes after an arbitrary amount of time

### System Information

Arch Linux

### LMMS Version(s)

Not sure

### Most Recent Working Version

Not sure

### Bug Summary

This might be a duplicate, but I checked and couldn't find a relevant issue.

VSTs play random notes after an arbitrary amount of time while playing a MIDI clip in the Piano Roll. Currently, as I write this, I'm noticing the issue with the [DecentSampler plugin](https://www.decentsamples.com/product/decent-sampler-plugin/). Not sure if it occurs anywhere else, but I remember there was [this plugin](https://www.nilsschneider.de/wp/nils-k1v/) where it happened too.

### Expected Behaviour

Notes in MIDI clip play as expected without other random notes getting in the way.

### Steps To Reproduce

1. Load a VST
2. Add notes to the clip
3. Let it play in the Piano Roll for some amount of time, random notes may start playing at varying lengths

### Logs

Click to expand

### Screenshots / Minimum Reproducible Project

_No response_

### Please search the issue tracker for existing bug reports before submitting your own.

- [x] I have searched all existing issues and confirmed that this is not a duplicate.

Start by reproducing the issue in the Piano Roll on Arch Linux with the DecentSampler plugin, then compare it with the other linked plugin. Done means MIDI clips play without unsolicited random notes after extended playback; the report provides no logs, project, or specific source file to inspect.

Written by the indexing model from the issue text.