I was right all along when I wrote:
Quote
It's related to setting transparency values on the form.

Mine wasn't a guess. I decoded the actual event from tracing the data in the Exception Stack.


BIAB & RB2026 Win.(Audiophile), Windows 10 Professional & Windows 11, Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors