Client doesn't load every chunk sent to it by server

My previous posts of this issue were labelled as duplicate despite it being completely different from MC-166508 and MC-223350.  So I have reposted. I ask you to have technical knowledge of the lighting/chunk system before grouping it with a vaguely similar issue. This is its own thing.

A server with 8 chunks render distance will only have 7 chunks displayed by the client, the outermost ring of chunks are not rendered despite them being sent fully to the client, you can see them render by using a mod that lets the camera move freely without moving the player serverside (free-cam), when viewed this way its apparent that the chunk has complete lighting and pallette, so why isn't it rendered? (even with client view distance at 32).
In the video attached you can see this in action. I use a free movement mod to move only my camera and when I enter "unloaded" chunks they are actually loaded (the data is there) but not rendered by the client normally.

If this problem (intentional or not) were fixed, it would increase the view distance of every player on every server by 1 whole chunk, greatly improving the quality of life for everyone.