Sync Metadata
I think I have discovered a bug. When I mark 2 photos in Grid view i Lightroom Classic and press the Sync Metadata button and press the Syncronize button in the Syncronize Metadata dialog, the syncronization from the active photo to the otherone does happend, also the Capture Time attribute.
But however when filtering or sorting it appeares that the value still seams to be as before the syncronization.
In other words the Cature Time attribute is not updated properly.
I corrected the error by marking all the photos I synced to and changed the Capture Time by adding one second, then doing it again by subtracting one second. After this operation sorting and filtering was as expected and correct.
I am running Lightroom Classic version: 9.4 [ 202008061458-dbb2971e ] on windows10.

