The emails in all folders under one particular account are very slow to scroll. It takes from a couple seconds to several seconds for the list to respond to the mousewheel or the scroll bar. This makes it almost impossible to use scrolling.
These seems to have happened after i loaded around 30,000 old emails into that account from Outlook, then exported them, then deleted them from eM Client. Scrolling was fine even with those 30,000 emails, but after deleting them it is not.
The scrolling problem seems to be for all folders under this one account, although there are very few emails in most folders. The largest folder has only 630 emails, but even folders with just a few emails are hard to scroll.