I'll reply using eth2 wording :

Update from xHash (early this morning)

>> After the urgent hardfork, we were forked for exactly 480 blocks. Fortunately, somebody catched it and warned us fast enough, but we were asleep and we couldn't resolve the issue within a timely manner.

We had to roll back to block 5200 so "theorically" you would've lost a lot of coins, however the devs didn't insisted to compensate the missing coins nor replying on our messages. In the end, some of you earned more coins due to that fork and they leeched our pool wallet. We were the biggest pool for quite a while when the block reward was 95 xuro, so some of you got tons of those.

We are now back in sync and mining on the right chain.

Special thanks to the "devoted" devteam, great to deal with you guys ! Keep up the good work - not replying or coordinating your hardforks!