Cannot change the field format back to milliseconds - Index Pattern field


I edited the field format to convert a field from milliseconds (input) to minutes (output). But when I revert it back to original or in other words when I remove the formatting, the data still appears in minutes and not in milliseconds.
Is this a expected behavior ? If yes, what is the work around ?

In the attached image, I changed from Duration to default.

Best Regards,
Parinitha Nagaraja

What version of the stack?

Did you save the change?

Where are you still seeing the previous format ?

Did you shift reload the visualization?