The devs wrote to Yobit already. Something to know about Yobit is that they act quite erratic and you never know what will happen with coin wallets there. Some run rock steady with less than a handful miners/stakers, some are in maintenance for ages despite chains as solid as they can get, some fork on their own or suddenly being traded as several forks with different tickers, some fork/disconnect by just not being updated and some come back or get updated without anyone, that might even include Yobit staff, knowing when, why it suddenly happened or how to manage to get Yobit to do it.