Unexpected "}" in all columns with type string

[wi-wissen]

From version 0.2.16 a trailing "}" appears at all values in all columns with strings. A downgrade fixes the problem. In the Vue-Devtools all values are consistently ok. Also within the component, as far as I can see. It does not occur if the value is Integer (e.g. "2") or a formatted Date (e.g. "11.03.2021").