Zone crashes getting too frequent

Tonight's T4 raid had all players in raid just waiting at Jade Courtyard receive "Connection to Server Lost" pop-up. We were able to re-connect and continue, but at last wednesday's KoA t6 the same issue popped when rolling out the loot from Yothians&Whisperer, and left few items "vanished" not received by people who rolled on them and box gone after all had got "Connection Lost" pop-up in raid. This issue and also issue of loosing the 2 or 1 group in raid out of the blue, with the people from said groups being ported out of raid instances, the things are getting worse with game stability.