Okay. On around 30% of the dives I lead someone in the group has a computer that beeps because it's lost its signal. I can't give you the numbers of divers with/without wireless integrated computers, but the total number of divers in the group never exceeded 8.
A computer beeping isn't a failure nor is it loosing sync if it regains sync within a small enough amount of time that the diver isn't endangered. The beeping is an alarm to make the diver aware that they need to monitor the computer to make sure that the problem clears or call the dive.
Most modern dive computers handle a short data dropout without a problem. These short term data losses are acceptable under the conditions of standard recreational diving and pose no more risk than not looking at your SPG.
So your quote of 30% of the dives you lead hearing a beep tells me nothing.
Other reasons for beeping could be due to fast accent or decent, low bottle pressure, nitrogen loading, PO2 or user error in setting up the alarms on the computers.
You heard beeping, to me it sounds like the computer was working and you dive with a lot of people that either don't know how to set them or are causing voilations that cause alarms.