Clocks change from GMT to BST problems

I have been having performance issues and weird behaviours with HA for a week or so, and notice the that the time is being continuously reset between British Summer Time BST and GMT.
I have looked at the settings I can find in the UI and setting in YAML file linked to time but nothing that deals with summer change to BST.

Running : Version core-2022.3.8. Installation Type Home Assistant OS

Any ideas?

This is a paste from my Logbook:

date and time changed to Saturday April 2, 05:33 PM by Date & Time (ISO)
17:33:00 - 7 seconds ago
Time (UTC) changed to 16:33
17:33:00 - 7 seconds ago
Time & Date changed to 17:33, 2022-04-02
17:33:00 - 7 seconds ago
Date & Time changed to 2022-04-02, 17:33
17:33:00 - 7 seconds ago
Date & Time (UTC) changed to 2022-04-02, 16:33
17:33:00 - 7 seconds ago
Time changed to 17:33
17:33:00 - 7 seconds ago
Date & Time (ISO) changed to 2022-04-02T17:33:00
17:33:00 - 7 seconds ago
Internet Time changed to @731

The problem has now gone away. Unsure why.