When the routers are power cycled and the standby router is not joining the HSRP does show cdp neighbor show the neighbor on the interface? It sounds to me like when they are power cycled that something is not initializing correctly and that the HSRP frames are not getting through.
In active and standby switch configuration you are trying to track the interface "standby 190 track GigabitEthernet0/1 20" and "standby 128 track GigabitEthernet0/0 20" of another physical router. I think it is possible to trace only the connected interface of the same device.
If you could share the debug ip standby we can trace this issue.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...