There is an issue with the way search bar queries are constructed when filtering in EuiMemoryTable component causing bugs when e.g. usernames or tags contain special characters: elastic/kibana#143079

To fix this values that contain special characters should be wrapped in quotation marks, e.g.:
username:user@domain should be username:"user@domain" instead
tag:(tag1 or tag2@tag2) should be tag:(tag1 or "tag2@tag2") instead