Happens to me as well. Probably cause I havent got any reads from the players so far. One solution would be to start playing with just 1-2 tables and then after 15mins of play increase the amount of tables to 3-4.

Another thing that happens to me too often is that I build a nice stack and then after an hour play or so my pretty stack starts to decrease. For some reason I start to raise with more speculative hands way too often and seek for action. Hence I have started to make my ring sessions shorter and try to be more concentrated and patient.