Describe the bug
With Modonomicon and Mekanism - possibly other mods affected too, AE2 was not - present, the spawn eggs tab moves to the second page of the creative inventory.

To Reproduce
Steps to reproduce the behavior:

1. Install the latest 1.21.1 NeoForge version 21.1.55, Modonomicon 1.106.0 and Mekanism 10.7.7
2. Create/Enter any world
3. Open up the creative inventory
4. See issue as described

Expected behavior
Spawn eggs tab remains in the first page as it would be without Modonomicon installed in e.g. a reasonably sized modpack.

Screenshots

System (please complete the following information):

• Modonomicon Version: 1.106.0
• OS: Windows 11
• Minecraft Version: NeoForge 1.21.1 21.1.55
• Modpack Link and Version, or list of mods: here's my latest log instead > https://mclo.gs/vjZbwXb

Additional context

It does not reproduce for me, but I removed the creative tab ordering instructions which might help with that.
If it remains it probably needs to be raised with neoforge to see if there is a way to consistently order creative tabs.

Hmm I think this is just due to the registration order instructions that neoforge takes for creative tabs. I will check if there is a way to just have the modonomicon tab at the end. Thanks for reporting!