5.4.4 Color Regions crash with SMPTE 2110

These are our settings:

Inner frustum estimated res (with overscan) 7340x2797

Inner frustum res: 6117x2331screen percentage 1.77

overscan of 1.2

squeeze factor 1.8 (anamorphic lenses)

base custom res: 1920x1317

the crash being not constant, we are thinking we are dealing with accumulated occasional data?

ViewPort.Min = [2795, -689739]

Viewport.Max = [4506312, 1870658176]

Log files of latest crash attached