Yes, I have noticed this happen a few times in the past, but not recently.
I never found it a major problem.
Just one of those behavioral quirks, which may, or may not, be an inbuilt TurboCAD 'feature'.
You can design without engineering, but you cannot engineer without design.
Using Win 10 with Designer 2017-2020 and TurboCAD Pro. Plat. 2018-2020 + Lightworks (64-bit versions) + AnimationLab 5.2.
Windows 10 Pro (1909) 64-bit