It is hard to determine the cause of the problem based on the provided information. Could you please provide sample project and steps for reproduce in order replicate the issue on our side?
Note, if you try to filter using Illegal characters, then the filtering will not be applied.
Illegal strings indicate which strings could not be entered as a part of the filtering value. Excluding values from the array will allow these values to be entered in the filtering value. However, it is not recommended because possible security vulnerabilities could arise.
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