Bug! Problem with Greek characters

Your software
My Mautic version is: 4.1.1
My PHP version is: 7.4.27
My Database type and version is: 8.0.27

Your problem
My problem is:

I have created a campaign form that has Checkbox group (Properties → Optionlist), so that users can select. For example

Label | Value
Επιλογή1 | Option1

For every choice, the “label” value is in Greek, and the “value” value is in latin. I actually used latin characters exactly to prevent this problem that I’m facing. The “label” value must be in Greek because it’s used on a Greek website.

I have then created a campaign that:

  1. Selects that campaign form as contact source
  2. If the value of that multi-select is…then assign tag.

That’s it. The problem it doesn’t gets processed unless the label in the multi-select option is in latin characters.

Note that the “Form field value” filtering on the campaign only shows me the label value. (check attached image).

These errors are showing in the log:

Steps I have tried to fix the problem:
I have verified that this is related to multi-select labels beeing in Greek.

Hi, anyone?

This is an actual Mautic bug.