In previous version 1.7.18958 64-bit it was OK.

I don't know why it was changed, currently the total time in playlist is in minutes, even if it's more than 2 hours, the time is like 143:08 (min:sec), it should be 2:23:08 (hour:min:sec).

It's in built-in skin and custom skin, so it's probably not possible to fix it editing the skin.

Is it possible to fix it in preferences somehow?

PP 200827 64-bit beta, Windows 10 64-bit 2004.