Preliminaries:

• Shopkeepers version: 2.19
• Spigot version: git-Paper-459 (MC: 1.20.4)

• I have checked that my issue/question does not get answered by:
  • The documentation.
  • The FAQ.
  • The Known Issues.
• I have checked all open and closed issues, but none seems to fit my issue/question.

Reproduction on a fresh and up-to-date Spigot server:

I was able to reproduce my issue on a freshly set up and up-to-date Spigot server (currently git-Paper-459 (MC: 1.20.4)) with the latest version of Shopkeepers (currently 2.19), with no other plugins and with no kinds of other server or client mods.

The issue:

Provide a detailed description of the issue and information on how to reproduce it.

Include:

• Description:
  Lightning spawn egg is turned into a Turtle spawn egg upon restarting the server.
• Step-by-step instructions on how to reproduce the issue:

1. /give @p minecraft:vex_spawn_egg{EntityTag:{id:"minecraft:lightning_bolt"}}, placing it spawns lightning
2. Put it in the shop, close the menu
3. Turn the server off, restart it, etc.
4. The spawnegg will be a turtle spawn egg and spawns turtles, instead of whatever egg it was before and lightning

• Server logs:
  There's no errors, warnings, or anything.
• If modified from default: Nothing.
• ... Anything else that might be useful to reproduce and identify the issue.

Spigot doesn't properly support spawn eggs with "EntityTag". See #718

Yeah I just saw https://hub.spigotmc.org/jira/browse/SPIGOT-5485

That sucks, man. Thanks