ViaVersion Incompatibility

[xMrAfonso]

Describe the bug
The bug itself is being unable to ping the server and when trying to join, being automatically disconnected.

Software brand
Paper 1.21.3-82-ver/1.21.3@5a60ffb

Plugins
ViaVersion 5.2.1, My plugin using PacketEvents 2.7.0

How To Reproduce
It appears with or without registering listeners, simply using the init() method is enough to cause the bug.

Expected behavior
Self-explanatory

Additional context
The code is open sourced. Note: The code in GH is using PE 2.6.0 but I tested on local with different things.

[xMrAfonso]

It appears the only thing that fixed it was shading PE.

[kyngs]

It appears the only thing that fixed it was shading PE.

@xMrAfonso what version are you shading in? I'm having the same issue as you, but shading doesn't work either.

EDIT: In my case, this issue occurs only when both luckperms and viaversion are present on the server.
EDIT 2: according to the discord discussion, it seems like you're also loading packetevents at runtime. What are you using? Libby?
EDIT 3: moving over from libby and shading packetevents via the shadowJar plugin does solve the issue.