Xbox disconnecting all controllers randomly

I’ve had this problem for a few months now. Even with fully charged batteries, all controllers randomly disconnect and will flash 4 or 5 times, reconnect, work for a minute, then disconnect and flash again. I’ve tried changing controllers, batteries, factory resetting, and desyncing the controllers. Sometimes I will have 3 controllers all flashing simultaneously. If I have them plugged in with a usb cord, there seems to be no issue. If anyone has any insight on what could possibly be the issue I would appreciate it.