Ring doorbell pro does not ring in-home chime

Recently installed Video doorbell pro, attached power kit to existing mechanical doorbell, connected the doorbell and all is well, except the in-home doorbell does not work. Doorbell setting is setup to ring in-home chime. When I remove the cover of indoor doorbell and press the button on doorbell, I can see the in-home chime trying to move the mechanical arm but not enough to hit the plate. I am wondering if the power kit is perhaps bad? Ring doorbell is reporting that the voltage from the transformer is at 13v, which is good. Anything else to try?