The following MS Teams Graph API has been throttling since last few days. (The surge has been seen since 23rd March)
POST /teams/{team-id}/channels/{channel-id}/tabs
Moreover, the following error has been seen very frequently on 23rd March 2021.
Missing critical details for CosmosDB endpoint
(Note: Application token is used for the API)
I am unsure if both of these issues are corelated. However, the same observation/pattern has been observed across multiple tenants.