The latest version of ImmediatelyFast for Neoforge 1.21.1 breaks Jade's display.
For example, images of versions 1.6.2 and 1.6.4 with a view of Mekanism machines.

Neoforge-Version: 1.21.1- 21.1.139

1. Picture: ImmediatelyFast-NeoForge-1.6.2+1.21.1
2. Picture: ImmediatelyFast-NeoForge-1.6.4+1.21.1
3. Jade-1.21.1-NeoForge-15.10.0 + JadeAddons-1.21.1-NeoForge-6.1.0
4. Mekanism-1.21.1-10.7.13.78 + MekanismGenerators-1.21.1-10.7.13.78

i can upload my modpack here...

I don't need/want the whole modpack. This would be too hard / time consuming for me to debug. I need a modlist (under 10 mods) which I have to install in order to reproduce the bug. If you can't provide that, this issue is going to remain unfixed for now

The Jade overlay works fine for me with the mods you mentioned:

Try to reproduce the issue with a reduced mod list. I can't debug the issue if it involves a giant modpack.