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Your Bungee is too outdated, download the latest.
As a side note you should review your plugins eg. ProtocolLib is not a bungee plugin.
ViaVersion is only designed to be installed on one or the other. The issue will lie with a Bungee plugin not handling version data correctly and...
You need to update your BungeeCord most likely then.
Provide the link from "/viaversion dump" and also provide if you use BungeeCord.
Have you updated the plugin? (Otherwise do you use BungeeCord)
We've had no users with this same experience, I'd suggest comparing with a 1.12...
This is the method that you should use,...
Can you provide more info about what kind of situation this happens with?
This isn't down to the plugin. Test your other plugins and see if it changes, different versions might just have different lag.
Ensure they're being spawned in the Runnable code in World.spawn (as a parameter), that way they'll be converted properly.