Kibana Discovery Regex

Hi @alisongoryachev,
Thanks for this Information.
But it doesnt work as i would expect.
Message: The Software Protection service has stopped.

Searching:
message:/Protection/ -> works
message:/Prot[eE]ction/ -> doesnt work
message:/Prot[A-z]ction/ -> doesnt work

I also get every time entering a search with / the message:
It looks like you may be trying to use Lucene query syntax, although you have Kibana Query Language (KQL) selected. Please review the KQL docs.

Is there another Syntax for searching regex?

Thanks,
Simon