Hi @Shootsum ,
The bad performances are well known for many month now (On line, Off Line) and you can find through the below link the evolution of the freezing process along patches deliveries since last December ?..:
PS4 (fat/slim and Pro) performances from lag to total freeze..
FYI, having been stucked 2 times I had to start from zero each time and it still playable even if freezing each time I don’t respect above recommendations @bostonchrisgaming described very nicely.
Waiting for a nice fix, you might tell your friend to make a copy of the file that cannot be loaded (on a USB key) and to upload it again once the next patch will be delivered, in order to see if it will be fully loaded.