Keep Inventory Doesnt Work in End and Nether

I'm on a server and a couple of my other friends have also had this issue in that server and other servers. I'm not sure if this issue happens when in creative.

Expected:

when killed in the nether or end, i respawn with all my items.

What Happened:

when killed in the nether or end, all items are dropped on death.

How to Reproduce:

• turn keep inventory on
• put any items/blocks into inventory
• make sure you're in survival
• go into the nether or end
• do /kill command or die any other way

Your inventory will be empty, and the items dropped in the nether/end.

However, this isnt the command rapidly turning off. Keep inventory works just fine while in the overworld.