I need a filter that checks if a datefield is empty.
So I tried:
Date last Active - empty -
The field is correctly disabled and nothing is in it. If I save the segment, the field is still disabled but shows the current date time instead of nothing.
Is this just a display error or is something wrong?
Additionally the filter doesn’t really seem to be working, because I have many profiles without any date in this field and nobody gets into the segment.
And when you save your segment and look again? Is it still empty? Because in my case it get the date parameter after I save my segment but it is also disabled and grey (like in my screenshot).
Oh wow, nice catch 
So yes, it stays there:
But at the same time, the db doesn’t save that date.
It’s a visual bug where the current server date is visible.
a:1:{i:0;a:7:{s:4:"glue";s:3:"and";s:5:"field";s:11:"last_active";s:6:"object";s:4:"lead";s:4:"type";s:8:"datetime";s:6:"filter";N;s:7:"display";N;s:8:"operator";s:5:"empty";}}
But for me the segment is populated:
