Issue with minion heartbit, when more minions in the same location

Problem:
I have a strange issue with the Minions that maybe someone can help me to debug

I have setup 2 minions on the same location and currently there is no requisition group associated to it

However, for both the minion, the minion heart bit is keep flipping between up and down

minion-hb

Do you know why this could happen? or how could I debug it

Cheers, De’

Expected outcome:
no heartbit issue

OpenNMS version:

28.0.0
as a broker, I am using kafka