CM - Player submit transfer requests far too much

I play Career Mode. I created a club, started off pretty good and I noticed my best 4 players all submitted transfer requests even though they are marked as "very happy", and I had just extended all of their contracts. What gives? Not only that, I never got notified that they were unhappy or that they wanted to submit a transfer request. How am I supposed to play a career mode season when my best players will randomly just want to leave, and especially this many of them at the same time? And they are all very happy....so wtf?!!!

I regret buying this game, that's a ridiculous bug. I hope they patch that soon because until then I see no point in playing anymore if Im constantly going to have bulks of players submitting transfer requests for literally no reason or even alerting me that it's going to happen.