Not a bug when order set BACK to NEW reason field NOT cleared itself

Affected Version
2.3.1 RC6


I unchecked the manually verify order from API setting, then set the order back to ''new'' and waited 10 mins but not gone to API, then accepted as it was still under verify order for API, again waited another 5 mins, cron running every min, but order not gone to API??? please check this and fix the bug asap. When order set to new previous comments under reason: should also clear back to blank but its not the case.