System Information

GNU/Linux OS, Manjaro distribution

LMMS Version(s)

1.3.0-alpha.1.880+2eea79b

Most Recent Working Version

Stable perhaps

Bug Summary

LMMS starts lagging when VST plugins or instruments are being controlled from the window that can be opened by pressing wrench icon. It lags less when window of VST plugin (not instrument) is closed

Expected Behaviour

No lag should occur (or at least it should lag much less)

Steps To Reproduce (VST plugin)

1. Put TripleOscillator to the Song Editor
2. Create an LFO
3. Put VST plugin on TripleOscillator (I used FreeClip)
4. Open plugin window by clicking Controls button and click on the wrench button which should say Control VST plugin from LMMS host
5. Hook up the LFO to any knob (I used Ceiling)
6. Play the instrument, CPU usage should increase

Screenshots / Minimum Reproducible Project

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