DOB filter not working as expected

Hi All,
Has anyone had any problems using the date of birth filter?

I thought id double check I can hardcode the 31st of the month even if its Feb I wanted to check against, seems to work fine.

However when I use the DOB filter: &birthdate=ge1892-02-01&birthdate=le1892-02-31
I got a patient with the DOB of 2019

Could this be related to SPINEDEM-1024?

Thanks,
James