Incompatibility with "Pinger" from PAPI

[I-Knight-I]

Trying to ping a server with ProtocolSupportStuff by using the PlaceholderAPI expansion "Pinger" throws the following:

[23:16:46 WARN]: [io.netty.channel.DefaultChannelPipeline] An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
java.nio.channels.ClosedChannelException: null
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(...)(Unknown Source) ~[patched_1.15.2.jar:git-Paper-298]

Narrowed it down to this plugin. Also always shows the server as offline.