Description:

• Have only tested with Fisher and Mining Rig, however using any item with the 'Unbreakable' Tag still breaks / gets removed after some time on a server.

Steps to Reproduce:

1. Place & Power a fisher or mining rig.
2. Using either commands or using the 'Hardening Catalyst' from the Things mod, make the required tool 'Unbreakable'
3. Not really sure if you have to unload and reload the area or whatever, but after some time the item will just disappear

Technical Information:

• Minecraft: 1.16.5
• Fabric API: 0.40.6
• Industrial Revolution: 1.9.18
• Modpack: n/a

Logs:

• Use a paste service, do not paste the logs directly here.
  Have no applicable logs

Details:
Extra information that might be helpful like screenshots or technical information about your computer.
I have no clue what actually causes it to use items with the unbreakable tag. It sometimes does remove, sometimes doesn't.

just ran into this today actually, Unloading is not needed, it just ignores the unbreakable tag entirely.