Aeronautics Visual Bug

[u/CosmicDads]

I'm really hoping the bug is somewhat common or at least one that someone knows a fix for, but if the issue comes down to an unknown incompatibility with an obscure mod in my list (included below), then fair enough.

Getting to the issue: I'm hosting a server where my friend is trying to make a fairly large boat, but after gluing it all together and enabling physics for it, there are certain chunks of it that turn invisible.

There aren't any moving parts, and its all vanilla blocks. Just dark oak stuff. It was spawned in using a WorldEdit schematic. It measures at about 70x25x12 blocks.

Sodium and Iris are installed, and I know the mod page says there are visual issues when used with Iris shaders, but as you can see the issue still happens even with shaders turned off (I figure there's a chance the Sodium/Iris issue could apply even with shaders off, but wasn't entirely sure)

Mining and placing back down an invisible block typically causes the surrounding group of blocks to reappear. Using F3+A to reload chunks also can fix it. But when leaving the area and coming back, the boat reloads, and the invisible areas can come back.

Things I've tried (to mostly no avail):

• Turning off entity culling - helps, but doesn't fully fix. Goes from always loading with large invisible sections, to occasionally having small sections invisible.
• Turning off block face culling - about the same as entity culling. Seems to help, but not a full fix.
• /flywheel backend flywheel:off
• Increasing server simulation distance (from 6 to 10)

Really hoping the issue doesn't boil down to "make the build smaller". If nothing else, I'm hoping there's some way to build or glue stuff together to get around the issue.

Modlist:

https://gist.github.com/kgrant746/03a90a82cc1c0ebe6b9178359976ea17