Although the patch notes warn of infrared not working on starting a new server, the problem is bigger than that.
I played a couple of games on the same server and randomly there would be “lifes” in which I wouldn’t be able to use the thermal view ability. Dying and getting revived would not solve the problem. But getting gibbed and respawning would. The lifes in which I would lose the ability were totally random. And it happened more than once in a single game, although not in a row.
That’s sad. I hope it’s going to be fix