Describe the bug
Something causes a lockup, then crash, when the UI of the Assembly Table is opened.
To Reproduce
Steps to reproduce the behavior:

1. Place Assembly Table down
2. Open UI
3. Crash to Desktop.

Screenshots
N/A

Additional context
Using the provided Assembly table from the Researcher. Is using a Resource Pack.

Version
Minecraft Version: 1.16.5
Forge Version: 36.2.23
Futurepack Version: 31.3.7005

Logs
https://pastebin.com/qPGBsGhf

JEI addons aren't showing anything different in the test instance. Switching to main instance and disabling JEITweaker, an addon to CraftTweaker

JEITweaker is to blame. Disabling it restored the recipe display. Mark this as "other mods fault".

what is jeitweaker doing / what can that mod do?

https://www.curseforge.com/minecraft/mc-mods/jeitweaker Here is the CF page.

somethign si heavily interfering with the recipe system here. But JEI can take sometime until all recipes show up becuase of syncing /reload should fix it.

/reload doesn't work as intended. Just checked with the Centrifuge.

dies this also happen with just JEI & FUturepack ? Does this also happen in a new wold with your mod list?

I'm duplicating an instance right now to check with mod interference one by one, will keep FP and JEI on

Another mod is interfering with the recipes. JEI and FP alone works fine. I am suspicious about CraftTweaker right now, so testing that next, with a mod (Travel Anchors) that has an altered recipe through it.

Not CraftTweaker. Checking JEI addons.

I looked at the crash report, seems like Mixin is a major player here.

somebody registered null as assembly recipe. is a datapack or a resourcepack used ? Also cpuld you get me the FPDebug.log I am hoping to fidn there a hint why there was anull recipe.

Here are the logs, but apparently it fixed itself. https://pastebin.com/exTqqzcV

I was thinking of dumping a list of all the recipes registered for the Assembly Table using CraftTweaker, but there isn't support for it for 1.16.5.

Now, JEI doesn't show Recycler recipes, but yet they still work.

JEI has bugged out again, only Analyzer module Recycler recipes are showing. Maybe check how the recipes are handled?

Problem about crashes that started this all happened again, with the Centrifuge this time.
Here is a crash report and set of new logs:
Crash Report: https://pastebin.com/1Rymy4ap
Logs: https://pastebin.com/NY5SYLFp

Details: I was loading Neon Dust into the Centrifuge via Hopper.
Suspicion: The Research check isn't working well with non-FP automatic methods of insertion (FP Pipes work fine, have those on a Neon Furnace/Super Crusher, No check for player who placed the machine down), screwing with the recipe load, resulting in a crash.

it has nothing todo with automation, something is fuckign with our recipes and adds null recipes which crash.

Well, from both crash reports, Mixin is involved somewhere. I am now going through mods that use Mixin Bootstrap.

Plus, this crash is inconsistent, but repeatable. I'd suggest seeing if a group of people have the time and patience opening the Assembly Table UI and rebooting MC if there is no crash over and over again until they crash.

In this case, the potential suspects are Immersive Engineering, Dragon Survival, Flywheel (Create), and Terraforged (which shouldn't really do anything as Terraforged does Worldgen).

I JUST remembered that I removed a Crafting Table Recipe from IE via CraftTweaker, Iron Rods in particular to prioritize the Iron Stick recipe from FP. I wonder if that is causing this.

Does this version work: https://redsnake-games.de/maven/redsnakegames/mcenderdragon/futurepack/1.16.5-31.3.7007/Futurepack-1.16.5-31.3.7007.jar ? (and if it crashes it should crash early on and show who added wrong recipes - if many recipes are missing please give me the log)

Passed game and save load, so far no crashes.