Every single week we experience the same issue. After maintenance, servers are most likely stable and gradually… they become more and more laggy and buggy as the week passes. It’s a fact.
This week is not different, but something new is happening. Since tickets are worthless most of time, I’m bringing this to our peaceful community. 
Even though server population is running lower and lower everyday and, still, we experience this kind of problem. Our potato server cant handle ~600 average players. And after having to spend 20+ minutes spamming [Enter Now] with a premaide party, we were able to enter the instance.
As soon we get inside we get kicked out and we all lose one run of whatever we wanna do. Saalus, Mercenary missions and even Dungeons.
Please do something because this Failed to create mission instance is getting really old and becoming the new “CommanderLoadFail”