The issue was caused by a mixed usage of the editor: it is used as a property editor and in other contexts as a "regular" editor. To solve this problem the new property editor InputChipsPropertyField has been introduced for regular content property editing. This new property editor is used e.g. for the free keyword selection on CMTeasables. While the existing InputChipField still exists, the package name has been refactored and does not accept the bindTo ValueExpression anymore. For these reasons the issue has been marked as breaking.

(CMS-19300)