Please disable third-party plugins and customizations (if there are any) and check if this issue persists. If you use a caching plugin, make sure that caching is disabled for logged-in users.
The time type and select are not quite compatible. We recommend using the select type for the editing section and for the search section; then, everything should work correctly.
I just have one problem, I need clients insert time for the request, if I change to select, I need to introduce all hour and half hour and more fields, start time and end time.
There is no way to use a field time and then filter it?