Quests dropping off local WIFI network?

Hi,

We are using a number of quests using Showtime for a group performance. In general things are working well (once the sensors have been disabled in MQDH and sleep timers set to 15 mins!) However we are using a local wifi setup (a router just for the quests and the show with no internet connection) but a number of them keep losing the wifi and not automatically reconnecting (they will reconnect when done manually) Is this because there is no internet signal on the network or some other issue? The router is in the room and for testing purposes is right next to the bank of quests.

Any thoughts or help much appreciated.