RE: Intermittent Error "You do not have permission to access these records. contact MS Dynamics 365 admin for help" on subgrid (Contact Entity)
I am having exactly the same issue but on the Quote products subgrid inside the Quote.
It's categorically not a security or access issue, as simply refreshing the page with no changes (sometimes takes a couple of refreshes), all of a sudden works. There is no issue 90% of the time, the records where the issue occurs do not seemingly have any specific identifying characteristics that would suggest that it would be an issue in certain situations. Records that have had the issue can then be seen again in another try without issue.
If it was a legitimate security or access control issue, then the issue wouldn't appear and disappear with a refresh.
The issue has only been occurring over the last couple of weeks, and whilst not happening all the time, it is still consistently happening several times a day (no obvious link to reoccurring at certain times of day)
There is nothing happening in the solution history at that time that would suggest service issues