Photoshop 21.0.3: Bristle tip brush produce uneven, broken strokes

This reply was created from a merged topic originally titled Bug report: some brush strokes not matching stroke preview in Photoshop version 2....

My version of Photoshop updated to 21.0.3. Now some of my brushes aren't creating strokes properly, specifically some Legacy Brushes and some custom brushes that I made a while ago. The stroke preview shows how I expect the stroke to appear, and when I draw with my tablet, the stroke looks like the brush's spacing is wrong or it is stamping segments of the stroke.

I discussed the problem with users on the Adobe Community page. We tried testing strokes with a mouse, a tablet pen, and stroking on a path but it is still not working. A different user recreated the brush I was testing on their own computer and found that it worked fine with Photoshop CC 2017 but then saw that it behaved drastically different in Photoshop CC 2020. They recommended that I report it as a bug to this community. Here is the thread from our discussion that details the problem with more images: https://community.adobe.com/t5/photoshop/problem-with-brush-strokes-appears-to-be-stamping-not-matching-stroke-preview/m-p/10881299?page=1#M300740

If anyone has insights toward a solution, please let me know. Help highly appreciated!

I am told this should be fixed in the next update that goes out.

This should be fixed in the 21.1 update that went out last night.

The brushes all work as intended now. But there is a new issue: the brush cursor preview doesn't dynamically show the current pen position anymore. It's static and doesn't change shape or move at all until I start drawing onto the canvas, at which point it will snap to and remain in whatever state the stroke started with, up until you start a new stroke again and so on. This applies to all brushes, by the way, not only the legacy bristle tips, so arguably it's way worse now than ever. I understand that the live preview window in the top right has been removed recently, but this surely can't be part of that? It still worked in 21.0.3.
As before, reverting to 21.0.3 or 21.0.2 fixes the issue.



As you can see here, the brush tip cursor doesn't follow the actual rotation of the brush.