Stuck notes, random trigger at interval, fl studio 20, windows 10

Opened up Scaler 2, dragged and dropped chord progression. Afterwards fl studio starts behaving strangely, even when removing the plugin. When i press down a note on my qwerty keyboard, and hold down, the note randomly gets triggered (at random intervals).

Note: the VST 3 version is even worse; I only need to open the plugin. I load the plugin, hold down a key on my keyboard and don’t release.

any ideas?