CS18ai losing coection mid performance

I've been using the CS18ai with an RM32 in small venues for quite a while...no problems. Yesterday was the first time in a large, crowded network environment. We had 3 shows, and all three times the CS18ai lost coection mid-set. RM32 still passed audio, but the CS18ai said there was no mixer coected.

We were using an average Netgear router that the CS18 and Rm32 were hardwired into. In addition to that, we usually have an ipad coected to the RM32, but last night when the CS18 got locked out, so did the ipad.

What could cause these problems? The router isn't great, but it was hidden. Any suggestions?