Notice how the natural fingerfall of the 4th finger is too sharp in this high position. You may find it necessary to lift the 3rd finger out of the way when placing 4th finger in high positions.
An alternative is to change the 3rd finger angle while still maintaining contact with the string.
The thickness of your fingers will determine how high up the string you are before this issue affects you.
Notice how the first joint of the 1st and 2nd fingers straightens....
