I'm absolutely convinced now that the loading process before the game is broken, and this does not only hold for Solo Challenges, but also Solo Battles, H2H, .... It is completely clear to me now after observing so many games where either the x-factors and abilities completely disappear (in Solo Challenges, as described in this thread), the abilities appear but do not work (e.g. my pocket deadeye Joe Montana completely misses his targets in a row within single games, without being pressured, while in others it works fine; or my HB Barry Sanders does not do any special Juke Moves (which causes this special sound if the ability is active), nor does Randy Moss completes any aggressive catch against single coverage). furthermore, the attributes shown pre-snap vary and sometimes my full speed 99 Randy Moss has a speed disadvantage of -2 or -1 (the highest value I've seen was -5?!?) relative to the CB who is covering him (on the first play with full stamina). the same holds for my 99 speed Deion Sanders and Rod Woodson...
this loading code seems to be a complete mess....
by the way: it feels so great (sarcasm!) when my 99 MCV Deion Sanders or Rod Woodson are continuously beaten by bronze (!) WRs and TEs (and there abilities obviously do not work either). this just happened to me. my opponent seemed to be a good player who has just started playing MUT this year, but someone has to explain to me what the point is of investing in better players when a 99 OVR CB is constantly getting beat by a 61 WR in a game?!? and no, I'm not completely inexperienced in the game and know how to react when that happens sometimes. but it's just ridiculous when absolutely every play at least 2 of your DBs just get screwed....