This is a repeat issue from REALMS-11696

which said this issue was resolved, but it either was not resolved or has reappeared due to some new reason. 

Currently, i am trying to run a realm with 4 different Addons, these would be:

Tinker's Construct Add-On    By FTB

More Blocks Add-On     By RareLoot

Naturalist Add-on     Starfish Studios - Claims to be Multiplayer Friendly

Farming Addon    by Podcrash

I had also tried running 3 others, but ending up removing them in an attempt to get the rest to properly load, these being 

Warpstones Add-on   by Mythicus - Claims to be Multiplayer Friendly

Realight Reimagined    by Tomhmagic Creations - Claims to be Multiplayer Friendly

Info Items Add-On     by Polymaps

As it stands, i have multiple different players saying they cannot see different Addons. The main offenders of this were Farming Addon, Relight, Info Items, and More Blocks. Whether this is an issue with the Addons, or the Realm is not possible from me to decipher, as there is no consistence in which addons either work or fail to load for different players. I have tried changing the order that texture and behavior packs load, reload and reinstalled all addons onto realm, tried using a different world for realm and the issue still persists. I had all my players clear their Marketplace Cache, with myself as realm owner included, and multiple Xbox consoles and Minecraft applications, even had one player reinstall the game and the issue still happened.

Truly thought this issue was over the first time it was resolved, but guess we are to unlucky for that to happen. hope this is an easy fix.

if anymore context, info from my side, or pictures of certain things is necessary, please let me know, and i get back with it ASAP