Events from Google Calendar are delayed


I encounter a bug with the version-12-hotfix and even the version-13-beta-3.

I create an event on Google Calendar on July 24th from 3pm to 4pm.
I synchronize the calendar on ERPNext
I go to Tools → Calendar
I update the calendar
The event is well created but on today’s date and delayed hour.

It only does that from Google Calendar to ERPNext.
The timezones are well set for the user and for the system (Europe/Paris)
The server’s timezone is good. (Europe/Paris)

Can you help me ?

Server : Debian 10.3
ERPNext : 12-hotfix or 13 Beta 3 release
Github issue :

Thank you,