[Zubersoft]

That's incredibly strange as there should be no difference between the way pedal actions would be triggered with the Donner pedal vs the BT-500. It may help to reset the pedal actions on both tablets (go to Settings->Touch & Pedal Settings->Pedal Actions, tap the keys field for pedal 1, tap "Clear" then OK, then repeat for the other pedals), then configure the pedal actions on the leader device again. Just tap the keys field, press the left pedal switch, then assign the action for that pedal switch. Repeat with pedal 2 for the other pedal switch. Then test out the "Connect Tablets" feature again to see if it works as you would expect.

Mike