Input problem with Custom Analyzer

Describe the bug
I am trying to edit an existing cortex analyzer (Urlscan_io_Search_0_1_1) to add a new feature. I want to add to this existing analyzer an extra option for a regex based search through Urlscan's capability to search using URL keyword regex. The issue raises when I use a "" character and cortex adds an extra "" character.

To Reproduce
Steps to reproduce the behavior:

Create or edit an analyzer and use as datatype regexp in Service Interaction File.
Use the analyzer and give as an input a regex with "" character in. For example "http://domain.test"
Then the cortex will change the regex into "http\:\/\/domain\.test"
Expected behavior
In this occasion we will expect to use "" character as it is without cortex adding an extra "" character".
The same problem rises when running OpenCTI_SearchObservables_2_0 analyzer with regexp option.

Start by reproducing the issue with a Service Interaction File using regexp and the example input, then compare the submitted and transformed values. Trace how Cortex handles analyzer input before the request reaches Urlscan_io_Search_0_1_1 or OpenCTI_SearchObservables_2_0. Done means backslashes in regexp input are preserved without extra escaping and the behavior is verified for both analyzers.