It seems that the column value is no longer feasible to use if it follows the new model. I tried deleting and reverting the component it still produces the same behavior and also it doesn’t write my YouTube thumbnail to the video thumbnail field after submit. This does not happen if this action is placed in On Submit.
Now I found another bug that is off-topic again, namely the detail screen will create double screen/page if the inlinelist button is double-clicked 