Thanks for the report @shy python - The issue is known and comes from our engine's culling techniques that were made some time back and don't work well with angled views, meaning the game isn't "seeing" various objects as "should be rendered" until they get closer to the center screen.
#[BUG] Triple Monitor Static Mesh Pop In & Out
lilac kayak
I think there might be a way to adjust this by improving the culling calculations we do for each track scene, we'll see.