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Hello, as the title says I encountered an issue where my custom mobs became vanilla mobs when they die(The mobs, drop the vanilla drops, instead of the ones that I set, the onDeath skills never trigger, and also the death of the mob doesn't count in a MythicDungeons trigger). This happens randomly, and I am not 100% sure what causes it, but I might have an idea. It seems to happen when you set the option Despawn: false in a mob, because 2 hours now since I removed this option, I haven't encountered the issue again(The issue normally happens immediately after a server restart). My server software is Paper 1.19.3 Build 404, but I had this issue with older versions of Paper and Purpur. I have tried to remove every plugin except MythicMobs with no luck. I haven't changed anything in the configs of the server(bukkit.yml, spigot.yml, paper configs). I am using the latest dev build of MythicMobs(5.2.3-SNAPSHOT/4367). Here are my MythicMobs config.yml and my MythicMobs Pack: config.yml ruins_of_petrania_dungeon.zip

Edit: I am using MMOItems in the droptables, but the issue happens with other items as drops too! The plugin doesn't throw any errors when the issue happens! Also, I am still testing and I haven't seen the issue for 13 hours now(As I said above the option Despawn: false seems to be the problem).

Edit 2: After more testing, the issue happens if you set the Despawn option to false or persistent. If you set it to true or chunk it doesn't seem to happen.

Edit 3: After even more testing the issue seems to happen when the option Despawn is set to false or persistent AND the mob dies from indirect damage from a player(for example fire applied by a bow/sword), or suffocation. Here is a log with debug level 4 (https://mclo.gs/vRJjfdM). I spawned 200 custom mobs in 1 block and 177 of them died from suffocation and the rest from me. 1 of the 177 that died from suffocation dropped vanilla drops. As you can see in the logs there are 200 entries of the MythicMobSpawnEvent and only 199 of the MythicMobDeathEvent. Also, there is an entry that seems interesting in line 10969 "Failed to load 7b44c6f9-d24f-4ebc-a327-924d44913ad0 from PersistentData".

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This issue from 3 months ago seems to be similar to mine #993 (closed)

I did some more testing and here is a video of the issue I am talking about (https://www.youtube.com/watch?v=SrerYX1kWsQ). The third mob from the last drops vanilla drops instead of nothing like the other mobs. Here is the log with debug level 4 (https://mclo.gs/40wapwV). As you can see the third mob from the last I spawned in the logs says that it failed to load data from PersistentData. As I already said the issue appears when I set the Despawn option to false or persistent and if the mob dies from indirect damage from a player, for example as the video shows with a sword that has the fire aspect enchantment. Here is the mob file(Testing_Mobs.yml) I am using in this test.

It seems that the issue is also happening with direct damage from a player. At this point, I will not use the despawn option at all. Hopefully, this will get fixed soon!

Closing this due to inactivity and major version releases since. If this issue is still relevant, please re-open the issue with a modern-version server log, example configurations being used to test, and step-by-step info to reproduce the issue.

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