Hi there! I've faced some glitch during scrolling list. For list i use OSA asset. TMP 2.1.3. Unity the latest 2019 LTS (2019.4.15f). It happens when new element is revealing. This glitch disappears when new text is applied to TMP component. Maybe this happens due to OSA asset doesn't disable components when they are not visible, but scale them to zero for optimization. Also, without "is scale static" it works fine. TMP settings GIF
I am not familiar with this OSA asset so perhaps the issue is related to it or with TMP. Either way, if you please could submit a bug report with project using this OSA add, that would be most useful in figure out the potential issue.