Premiere sometimes not rendering 4k MXF files from Sony FS5
Premiere supports MXF container file formats with the following formats
P2 Movie: Panasonic Op-Atom variant of MXF video in DV, DVCPRO, DVCPRO 50, DVCPRO HD, AVC-Intra
Sony XDCAM HD 18/25/35 (4:2:0)
Sony XDCAM HD 50 (4:2:2)
AVC-LongGOP
XAVC Intra
XAVC LongGOP
JPEG2000
IMX 30/40/50
XDCAM EX