Recurring weekly meeting time appears incorrect around the date of changes in time zones

I am setting up a weekly meeting for an international audience, and anchoring it to a 1am UTC start time.  Looking ahead on my calendar I can see that the start time changes from a 1am start time to a 12am UTC start time around the date that other timezones change their clocks by an hour.  (This effectively changes the start time by 2 hours instead of the expected 1 hour change on my local calendar.)  I don't want the UTC 1am start time to change.  I tried anchoring it to 1am GMT but the same problem occurred.  This appears to be a glitch on zoom.  
Is this a known problem and is there work being done to correct it? (Or am I overlooking something?)