We will never know what was the cause of their disput; only

https://www.furaffinity.net/user/autofurr/

might know about this mystery.
But it´s also not that important in my opinion. Both men obviously don´t like to argue and have the bravery to proper apologize and forgive.
No wonder !
Ian knows that the handsome yeti man is too precious to loose and Autofurr´s fluffy Vlad never even thought of giving up his new cervine relationship that reminds him about the good days in the forest.
If life would just be so easy in reality, especially nowadays humanity could learn a lot from them peaceful powerhouses:

More cuddle, less fuddle !

More Shagging and no nagging !

Keep hugging and avoid shugging.

Increase talking and end stalking !

Nuff said !