I'm experiencing exactly the same thing.

• Jeroba v0.0.54
• lemm.ee

I have no problem scrolling on the local and all feeds, just my subscribed feed.

Another potentially useful thing to note is that when I change the sorting algorithm, the posts change, yet the number displayed is still the same and I still see the same error message.

I have also logged out, cleared cache and storage and logged in again, and have uninstalled/reinstalled.

I am not experiencing this in the browser.