For issues with the chain tension, try taking the cover for the tensioner off and put a small clip of a zip tie or something in there. It seems like there is a gap at the back that allows for too much wiggle and loosens the chain, adding that helps fill in the gap and doesn’t let it wiggle as much.

Pochita

I have a 535iXP that I bought new and it has bee a TERD since day 1. I can only make a few cuts (always less than 10) and then it flashes the overheat signal and won't work again for 20 mins or so. Does not matter if it's summer or winter. Brought it to a dealer when it was still under warranty and they blamed the battery, not the saw. Took them almost a YEAR to get me a new battery (factory back order) now I am out of the warranty period, and the saw still won't do more than 10 cuts. Friend has one and his works great. Swap his battery for mine and his saw is still good and mine sucks. Husqvarna customer support won't help! They just refer me to a dealer. Dealer won't help because its out of warranty. Bought this new and have literally made less than 100 cuts with it. Total junk and even a "PRO" saw like this is no good and si I wasted a ton of money and Husq won't stand behind their product. Buyer Beware. By the way, I have a lot of other Husq equipment that has done well for me but this was a total waste. First time I splurged on Pro and just got hosed.

Just about to buy one, really helpful. Thank you

Bro you look pretty proffesional, like the helmet and the ISA logo but not trying to be critic here but if I'm not mistaken your chain is way way too tensioned. Seems to me like there is even some smoke at the end of the video, you might want to check that