Noticed something weird; was at a low cup value to be top 100 and when I looked at the leaderboard I realized a bunch of people were missing from my own alliance and quite probably others too.
I killed and restarted my client twice, saw the same behavior all three times: there were players that were clearly above me in cups on the alliance member page that weren’t displayed on the leaderboard. Additionally when I looked at these same players profiles they were listed at the correct rank for their cup value.
Attaching a set of photos documenting this after the first client restart. Happened just now; @Dante2377 also saw in game after I asked in alliance chat if others were seeing an issue. Took a video of the leaderboard as well if the full ranking list is desired.