Is there a way to lock the phone holder in it's positon on the extension rod? I have an iPhone XS Max and with it in the holder, it doesn't stay in place and rotates by itself as it's too heavy. See the attached picture.

Hi, we're sorry to know about this situation. I would like to ask if you've managed to test this with a different mobile device which lighter compared to this iPhone XS Max? We will check this situation with our related team to see what would be the recommendation in regards to this situation. Thank you for your support.