Wireless RF remote control

I installed this 12-24V wireless RF remote control relay switch. It works but the on wall switches stop working. Can someone please explain this to me what I did wrong? Thanks so much.

Since our relay only provides a simple on/off output, I think maybe you can try following.
Disconnect wires from receiver, just keep connected to wall switch.
Manually simulate the relay on/off by connect/disconnect wires.
Observe if the wall switches works normally.

Maybe you can consider using another relay terminals on receiver, or use shorter wires, it might help solve the problem.

Thanks.

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