Summary: When going through nether portals (overworld to nether) on realms, you can take suffocation damage while in the loading screen, which takes far longer than normal. Once you have loaded the nether, then you either take no more damage, or are shown the 'you died' screen. Sometimes this can occur without any damage noises.

What happened: I went through a nether portal on a realm, and took suffocation damage, dying. On repeat, this turned out to happen only some of the time. The death message shown was 'T1nyRaccoon suffocated in a wall'.

How to repeat: Go through a nether portal on a realm (possibly only on an iOS device). repeat until damage occurs.

Thanks for your time, T1nyRaccoon