Crashing server/realm with custom slime spawn egg

What happened:
I saved a custom slime spawn egg in the creative "saved toolbars"
Went on to a realm where I had creative and used the spawn egg.
Waited a few seconds and timed out and after that, I (and other people) was unable to rejoin the realm for a few minutes. (When realms crashes it reopens after some time which is why we were able to rejoin after a few minutes)
I also tested this on a server hosted on my computer and it crashed too. (I have attached the server crash log)

How to reproduce:
1. Go into a singleplayer world with cheats enabled and use the command:
/give @p minecraft:spawn_egg 1 0 {EntityTag:{Size:2147483647,id:"minecraft:slime",PersistenceRequired:1}}

/give @s minecraft:slime_spawn_egg{EntityTag:{Size:2147483647,PersistenceRequired:1}} for 1.13 snapshot versions

2. Go into creative and save the slime spawn egg in your saved toolbar (C+9)

3. Join a server or realm where you have creative and load in your saved toolbar (X+9)

4. Place the spawn egg

5. See the server crash

Extra info:
It seems like the slime size can be smaller and still give the same result

Because some servers automatically reopens (and does a small backroll) I guess you could put the spawn egg into a dispenser and have that dispenser spawn in the slime every 5 seconds (or something like that) and thereby keep a server closed for forever.

Please note that you don't need op on the server/realm to do this. You only need creative.