I am in a similar situation. SQL Server 2014 (Read only) & Grafana v8.2.1
Dates stored as datetime2(7)
Value in data base: 2022-01-27T12:47:09.784Z (displayed as source code in ISO8601 format, so UTC)
Everything seems ok, it´s the actual time. Then I check the received data in Grafana:
(raw data) 1643291229000 or GMT(UTC): 2022-01-27 13:47:09 (data shifted of +1 hour).
Bug or I’m doing something wrong?