Getting Inconsistent result from get channel Message delta API

Hi,
We are currently using below Graph API call to get a list of messages received after a time stamp.

https://graph.microsoft.com/v1.0/teams/<teamId>/channels/<channelId>/messages/delta?$filter=lastModifiedDateTime gt 2026-08-06T00:00:00Z&expand=replies

But recently we have been getting inconsistent results like getting initial empty response with a next link and then response getting complete history of the messages in the channel after processing next link.

We tried searching for the documentation regarding the channel message delta or in change log for any similar changes recently, but couldn't find anything meaningful.

Please help in resolving this and providing reliable documentation reference also for list channel message and its delta.

Thank you.