Effect/instrument window positions are not saved

System Information

Arch Linux, GNOME

LMMS Version(s)

master

Most Recent Working Version

No response

Bug Summary

If you open any instrument/effect control windows, move them around, and then save the project, when you reopen the project the effect windows will all be closed. And when you go to reopen them, they do not appear in the same place.

This is in contrast to the default windows, such as the Song Editor or the Piano Roll, which keep their position between sessions.

Expected Behaviour

When saving a project, the position and visibility of all windows should be saved.

Steps To Reproduce

1. Create a new project
2. Add an effect/instrument
3. Open the effect/instrument's controls window
4. Move it around, and save the project
5. Reopen the saved project
6. The window is not visible, and not in the same place.

Logs

Screenshots / Minimum Reproducible Project

No response

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