ArgumentError: stream not initialized

[Keno]

Seeing this intermittently, but don't know what causes it:

Unhandled Task ERROR: ArgumentError: stream not initialized
Stacktrace:
 [1] isopen
   @ ./stream.jl:376 [inlined]
 [2] wait_readnb(x::Sockets.TCPSocket, nb::Int64)
   @ Base ./stream.jl:406
 [3] eof
   @ ./stream.jl:106 [inlined]
 [4] macro expansion
   @ ~/.julia/packages/OpenSSL/6Zi8I/src/ssl.jl:645 [inlined]
 [5] macro expansion
   @ ./lock.jl:376 [inlined]
 [6] eof(ssl::OpenSSL.SSLStream)
   @ OpenSSL ~/.julia/packages/OpenSSL/6Zi8I/src/ssl.jl:637
 [7] monitor_idle_connection(c::HTTP.Connections.Connection{OpenSSL.SSLStream})
   @ HTTP.Connections ~/.julia/packages/HTTP/JcAHX/src/Connections.jl:292
 [8] (::HTTP.Connections.var"#3#4"{HTTP.Connections.Connection{OpenSSL.SSLStream}})()
   @ HTTP.Connections ~/.julia/packages/HTTP/JcAHX/src/Connections.jl:312