Graph api change tracking – Get changes although the fields didn’t changed

I am using learn.microsoft.com/en-us/graph/delta-query-overview?context=graph%2Fapi%2F1.0&view=graph-rest-1.0&tabs=http API to track group changes using select query param for display name, description and members. But for some reason although no changes were made in those fields a changes are returned in the delta link.

For example on the same delta link but different pages:

{"displayName": "Group1", "id": "149e3c4b-5594-4f78-a446-36e343d7d225" }

{"displayName": "Group1", "id": "149e3c4b-5594-4f78-a446-36e343d7d225" }

This is on client environment so I don’t have all the details but as you can see no change was made.

What can cause such behavior?