If we have type=>json field in model and for some strange reason add it as column in grid and enable filtering, then Table\Column\FilterModel throws error

Critical Error
ErrorException: Undefined index: json

in vendor/atk4/ui/src/Table/Column/FilterModel.php:75

That's because filtering for this field type is not implemented and that's kind of understandable, but at least it shouldn't throw such ugly exception. Better would be to simply not add filtering in this column.

Probably same happens with fields type=>object and maybe enum and values type of data fields.