Players become invisible.
⚠️ Precautions:1. Only a certain chance to reproduce.
2. Invisible players injured no sound / subtitles(Player hurts).
3. Players cannot use the elytra.
4. Invisible players will not render portions animations / particles.
Potion particles.
Fire (player fire.) animation.
Stay on the arrow on the player(Players injuries by the arrows.).
Players wearing Elytra not rendered.(May be because fixes the MC-93532 / MC-93503)
Reproduce steps:
1. Render Distance = 2 chunks
2. Switching to Spectator Mode.
3. /kill
4. Use "/tp" to has not yet loaded region(One or more).
5. Switching to Survival / Creative / Adventure Mode(F3+N).
Reproduce Video:
https://www.youtube.com/watch?v=s-qQ6bcFBhg
https://www.youtube.com/watch?v=4a3D9FH6qxA
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Please provide more informations: for example in what situation you experienced this issue?

Force a crash when this issue occurs by pressing and holding F3 + C for 10 seconds and then attach the crash report, if you don't know what caused it.

Might relate to MC-93377
Please Mod confirm to whether the easily reproduce?

Unable to reproduce in 16w32b.
I do seem to be able to get it when repeatedly teleporting.
Maybe more than once transferred?

Because my bug report (MC108785) duplicated this one I'd like to mention how I reproduced this on the latest snapshot (16w43a) because my method differs from the OP. Hope this helps and isn't inappropriate.
Basically this happens all the time on my server (16w43a) but only when another account logs on as well. As long as I'm alone I can switch from Creative to Spectator and back endlessly and nothing happens (I remain visible). But the very moment I'm joined by another player then my arm (and preview area) becomes invisible as soon as I switch back from Spectator to Creative.
Hope this can help.
This issue has been fixed in 1.12 Pre-Release 3.

This happens to me using 1.12 official. Switching from Spectator mode to Survival mode makes me render invisible on my screen (and my arm, and my avatar in inventory gui). But other players can see me just fine.

This still occurs in 1.12.2, simply by switching to Spectator and back to Survival. I was able to see my arm in first person, but I was invisible in the inventory and third person.
This issue still occurred in the 18w01a?
I can't seem to reproduce this in 18w01a.