Mouse freezing in eM Client on iPad Pro

Started trying out eM Client recently on my PC, then decided to also try it on my iPad Pro that I use with a Magic Keyboard (includes trackpad).

However, after adding my emails accounts (8 total), as soon as I try to starting using the app, my mouse dot/cursor starts to freeze up every few seconds.

As soon as I leave the app, it works fine again. I do not have this issue with any other app on my iPad Pro. Whenever I reopen eM Client, it immediately starts happening again.

I couldn’t find any other reports of this issue, but hoping there might be something I can change in settings to fix this? Or is it a bug? Suggestions?

UPDATE: I confirmed that the slowdowns only seem to occur when I have the cursor on the email message body panel on the right side of the screen.