TPA3116D2 bluetooth amp board problem

So I bought a chinese amp board with BT to enable my desktop speakers. Connected it and did some listening, seemed fine. Unpaired it and tried another BT source. Not able to connect and seems now undiscoverable, even kills WiFi connections if powered on.... It acts like it can only be paired ones.
The manufacturer seems to be WUZHI and the board partnumber is ZK-502.
Anyone any thoughts?
Appreciate any feedback, tnx