@georgehristov do we duplicate somewhere the model without cloning it, so the conditions are unset? That is what I think is the issue.

@mvorisek , @georgehristov seems adding this to renderView() fix the behaviour:

    $this->callback = \atk4\ui\Callback::addTo($this);
    $this->callback->set([$this, 'outputApiResponse']);

Not sure what it is doing.
These lines have been moved to init()

@ibelar I think you want the one who moved this part, please check

@ibelar I think you want the one who moved this part, please check

@mvorisek - Yes - It was moved to fix #1462

@ibelar I think you want the one who moved this part, please check

@mvorisek - Yes - It was moved to fix #1462

but for some reasons no PR is linked there...

Close because replace by #1558