Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

This error message "Listbox cannot have more than one selected value in multi-selection mode." does not really make sense. I guess it should say that "in single-selection mode" or "when not in multi-selection mode".

Reproduction

No reproduction as this is just logic error in the text error.

Expected Behavior

Actual Behavior

Environment

Angular CLI : 21.0.5
Angular : 21.0.8
Node.js : 22.21.1