installed Tapo D225 video doorbell yesterday and my existing house chime is not working.

Used hardwired powered but NOT using Always on Mode and not using the jumper wire.

Have transformer voltage of 19.5 at existing terminals hardwired at the back of the D225 unit.

Doorbell press does not ring existing chimes.

However, jumping a wire across the terminals at the rear of the Tapo device DOES ring the existing chime. That is of course what the simple prior doorbell accomplished when pressed.

I did pair the Tapo chime that came with the unit but that fails in comparison to the existing house chime.

Any ideas appreciated before I consider a return, thx.