‘Restart countdown after’ not working… increments sale start time

“Restart countdown after” [5 days]

is not exactly working.

A product set up to go on sale for 1 hour (eg. 1pm-2pm) then restart 5 days later, will reschedule for 5 days later but also 1 hour later start time.

Example: a sale on Nov 14 1pm to Nov 14 2pm will restart 5 days later as Nov 19 2pm to Nov 19 3pm.

Can this be solved?

Thanks