Hmm. Twitter/X appears to do this at quite a low number, as the "Following" tab is incredibly lossy (some users are permanently missing) at only 1,200 followed people.

It's insanely frustrating.

Hopefully you're adjusting the lossy-ness weighting and cut-off by whether a user is active at any particular time? Because, otherwise, applying this rule, if the cap is set too low, is a very bad UX in my experience x_x