Can you attach the part and drawing ?
It happens to all parts or just this one ?
What is showing in the left side when you click on the dim ?
There have been a number of similar issues posted here lately. I believe some of them were related to graphics card issues (see Why am I getting weird graphics issues?), while others were related to the chosen font. If nothing at the blog post I linked to helps try switching to a different common font, such as Arial, and see if that helps.
Thats true, i also saw a bunch of posts with graphical glitches, is SW 2020 SP4.
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