QAN: Search by returns unexpected results

User impact:

User can get weird results from Search by

STR:

Add pg stat monitor to QAN 

Put "add" into Search by field and hit enter

Actual result:

Many queries which doesn't contain "add" are listed, for example:

[^localhost_Archive [22-03-14 16-54-06].har]

Expected result:

Only queries containing "add" returned