Endpoints and relays are not updating their last report time

Hi All,
I can see almost 90% of endpoints and all relays were showing last reporting time as 10days ago.
But from past 10days we are taking actions on endpoints and they are executing properly.

all of them showing last reporting as 5th of Sep. But from 5th to 15th we have actions deployed and they are getting completed properly.

What is the issue with updating time in console and what are the things I need to refer… ?