Brining up new subinterface w/ HSRP in ISR4300 caused another HSRP group's IP to stop responding

Scenario: G0/1 connects to switch and has several sub-interfaces running HSRP.

G0/1.500 was in a separate vrf. Moved it back into the default vrf which caused it to remove its ip and HSRP config. Reapplied IP and HSRP info, then suddenly g0/1.200 HSRP address stopped responding.

.500 is in a different group number and is in a different subnet.

Logs showed no changes at all to the HSRP process on .200

Is this a bug?