Consistent game crashing when other leagues are enabled

[MRC]

After thinking I finally had the savefile down and getting it to verify without issue (albeit with CL, EL, ECL being deleted because they keep throwing up issues in AR since the last update, for me at least), I found that when I run a savefile with just the leagues of the custom nation I created being simulated as playable, it runs without issues or crashing.

But when I simulate leagues from, say, Germany or England, I get crashes on the 14th of september (which is when the second round of one of my cups is happening).

Has anyone experienced the issue or an idea how to solve it?AR 23.4. MRCX ESL verified.fmf