On deathscreen the body is visible.

When you spawn back into the world the body vanishes?
Not sure if its the mod or my modpack.

Config = Default

Regards, Curtis

What is the modpack?

This is a known issue and because of the state of the code-base, a rewrite is in progress to help make solving issue like this in the future easier. Hopefully the rewrite will solve this as well.

It's worth noting this issue still persists in the 1.12.2 version. The corpse is there, the client just isn't aware it is as logging in and out usually fixes the problem

The planned rewrite hasn't occurred yet - all that has happened is a straightforward port.

The issue really is that the client is never informed of the new entity existing for some reason

It's September, and I was wondering about the status of this issue. Is a rewrite or fix underway yet?

As a small team (only 2 permanent members for all of Doc Cyano's old mods) we've been unable to track issues in all of the mods. Even discussing this with Doc Cyano himself (he is sometimes on Discord) why this occurs is a mystery.

Actually, I was encountering an issue where no body nor nametag showed up, and right clicking where other players said it was didnt bring up a gui.

My best guess is that it's a latency problem making it really hard to track down.

The texture for the entity isn't downloaded before the entity itself is displayed on the client which leads to it showing up invisible. You never run into this issue if you have the default texture set.

Something like defaulting to having all bodies use the zombie (or player supplied) default skin that then gets replaced with the players texture once it's actually loaded would probably be the best bet to prevent corpses from being hard to find