ZQuery and Filter problem in 6.6.3

[jaridmo]

I have this filter

LotNumber LIKE 'E-*'

I have a lot of rows in the returned dataset, but when I set Filtered = true they all go away including the E-2008 LotNumbers.
Interestingly when I set Filtered back to false none of the data reappears. I have to close the Query and re-open it to see it again.

I ran the exact same filter on Zeos version 6.1.5 and it works as expected (all of the E-2008 rows show up and when I un-filter everything is there).

Something has changed since 6.1.5
Any ideas??