Wrong frame count via play on web

Hi Guys,

I got the issue when I upload video as version and when I played on web. the duration is 176 but when I checked my video it is 156.

I check the frame count of the version. it’s always empty. and then I check cut length and cut duration. the cut duration was 176 so I changed it to 156 now

but it still play with 176. what should I check then?