Hi, it isn't a problem, that a protection mechanism as been fitted. Wise even if its not used much, exceptional cirumstances etc.
Under certain circumstances can mean anything. When & why (will it get above designed temp), if at all, in all circumstances, needs real life info.
FFB is dependant on Game, Game settings, Fanatec wheel settings etc. So it is likely very strong FFB, long play time or a combination, can cause protection to kick in, when ?
Fanatec have said, prob on this forum ? something like( can't remember exact details), they tested one wheel in China(which one ?), 24/7 for a week or whatever. Maybe protection kicked in then ? Or even thou test is a bit extreme, a motor burned out, so they fitted protection, who knows ?
Lots of peeps have these wheels on this forum, at least info from them, is real life usage. So worth noting, even thou everyones usage is different ie Games, settings, time played etc.
Not long ago someone posted about one Fanatec wheel, FFB was that strong(Game settings, Wheel settings etc), it was being ripped out of his hands at times, being just a Gaming wheel, prob best to turn down FFB a bit

, you can see protection kicking in at some point in time, i would imagine.
You will see probs thou, been thousands(think one wheel had one batch size of 10,000 ?), of these wheels sold.
Cheers BOB