This is 4.2.1. There’s a problem when zooming with the mouse-wheel on the viewers.
Restart TVAI and import the clip attached below (MP4, 720x480, DAR 4:3). Switch to comparison mode side by side and make sure that the zoom settings on the viewer are set to 'Fit. Now, zoom-in using the moues wheel and then zoom fully-out. The picture is cropped and stays cropped. I have a certain feeling that this doesn’t only apply to anamorphic material, but also to video with SAR 1.
That’s how the frame should look like (100%):
That’s how it looks (Fit, fully zoomed out):
Jockey-FC 4x3 480p60.zip (3.2 MB)