That's a result of dynamic registrations being bugged in MSFS 2024. All dynamic registration issues will be fixed in SU4. You don't see them everywhere else on the aircraft because I was able to make them invisible, but when you combine too many layers of visibility code, they get confused, apparently.
The tiny objects disappearing is also the result of MSFS 2024's overly aggressive LOD system. I now run the risk of having any small objects in my aircraft disappear while you're looking directly at them. There is a time consuming fix I can apply to individual objects, but we've also been advised not to try defeating the LOD system with such workarounds. I've done it for crucial elements in other aircraft, and will probably try to find some of the ones in this one too.