TYPO3 Core

I created a form variant and noticed that when you use a . inside a key and save the form in the backend again the form variant options get "corrupted"

example:

1. Creating a new variant option in the yaml file.

variants:
          -
            identifier: multicheckbox-1
            condition: 'formValues["singleselect-1"] && formValues["radiobutton-1"] == "TEST"'
            properties:
              options:
                'test (test2) test3. test4': TEST

2. make (any) changes in the form editor in the BE and save the form again.

3. the variant changes to

options:
                'test (test2) test3':
                  ' test4': TEST

I only noticed that because I copied and pasted the values. The original key was longer and was also split before the closing bracket but I couldn't reproduce this in this example.