Zoekt code search always performs regex search

regex mode is false but looks like it performing regex search:
https://gitlab.com/search?search=test%5Cd%2B&nav_source=navbar&project_id=278964&group_id=9970&search_code=true&repository_ref=master&regex=false

If I toggle the regex mode on and off on that search, the results are always the same.

Possible fix: We need to upstream a change to allow "exact" exact code search to Zoekt. It can be new syntax like exact:yes