Some groups lost connection to Planner Plans (tasks, decision, meeting planner)

Update timeline

1. resolved Jul 16, 2024, 07:39 AM UTC

   - Problem: The impact occurred intermittently starting in April/May 2024 and was resolved in June 2024. The information about connected Planner Plans to a given Teams Team Channel were in some instances incorrectly cleared from the Decisions API and the reference object, ultimately leading to displaying the Plan as removed or deleted in the Decisions app, although everything was still there. - Root Cause: Upon investigating all possible paths that could have cleared the information programmatically, we have identified a couple of places in the code were the logic were incorrectly implemented. In some error conditions, these incorrect implementations could lead to the clearing of channel reference information when not intended. - Solution: All identified cased that could have lead to incorrectly removing Channel reference have been identified, resolved and fix released