When performing a field search (i.e. specifying individual fields rather than a template) what is the expected behaviour if a field is included but no value specified?
A client has mentioned that the behaviour has changed between 9.1. and 9.2 whereby in 9.1 the blank field would be ignored whereas in 9.2 it literally searches for blank field values so the results are different. I recall the behaviour changing in 8.x maybe but can't find any info in the release notes to indicate this.