[rules-users] xdrl, matches and nested method calls

Hi. We're using Drools 5.1.0 with .xdrl files. Now we encountered a strange problem with the 'matches' behavior. We have the following pattern that seems to have the problem: <dro:pattern object-type="EMail"> <dro:field-constraint field-name="subject"> <dro:literal-restriction evaluator="matches" value=".*\QCRYPT\E.*"/> </dro:field-constraint> </dro:pattern> Subject is a String with the content "my CRYPT subject". The rule isn't fired as expected. If we ONLY change field-name="subject" to field-name="subject.trim" the rule fires. Any pointers what that is? Thanks Veit