Searching for Entry results in crash

I’m using the following code to find an Entry by propertyId (it’s a String field defined in the Entry) and the field does exist. Also, the content type is myBuilding. propertyId is just a string.

When calling this api it just unexpectedly crashes with no message as to why (it does not even call onComplete or Error or onNext):

Found the solution (used Matches). Thank you