u/Berboinsens

Sorry for opening up this topic once again as im still quite new to all of this. I measured it with the big big method and double checked with an online calculator. Largest chainring is 50 and largest sprocket is 34; chainstay 405mm. Got it to 110 links. On a descent yesterday when i pedaled half a rotation backwards the chain came off at the front. Also it seems to have quite a lot of slack when shifting sometimes and makes a little noise at the back; otherwise shifting performance is great. All parts are new and freshly waxed.
Maybe this is more of front derailleur issue?
Thank you guys very much in advance :)