Maxitems for column not working in workspaces

[treknuts]

Typo3 v11.5.34
PHP v7.4.33
Content Defender v3.4.1

I am experiencing an issue with a column where the maxitems = 1, but it's allowing the addition of a second content element while editing the draft workspace. I get the following error while attempting to add a second content element in the live version:

"Sorry, you didn't have proper permissions to perform this change.
Maximum number of allowed content elements (1) reached. 1494605357"

Here is the column configuration:

columns {
  1 {
    name = HERO
    colPos = 3
    allowed {
      CType = allowed_element
    }
    maxitems = 1
  }
}

The allowed section is still working as intended, but it's not following the maxitems configuration.

[kitzberger]

I can confirm this issue with TYPO3 11 and EXT:content_defender 3.4.3

• It's currently possible to add a 2nd CE via a draft workspace and publish it successfully to the live workspace. Which should not be possible.
• But it is not possible though to edit the 1st CE in a draft workspace. Then the exception 1494605357 is being thrown.