Hi, I am the maintainer of the Gnuplot.jl package. I never saw this problem, but I’m not really surprised since the gnuplot program do not provide any kind of API interface, and the communication between the Julia package and the underlying gnuplot process occurs by means of text sent through a pipeline.
As a quick workaround, could you please try other terminals such as the windows or wxt ones (as suggested by @PetrKryslUCSD)?
In any case I will try to reproduce the error on a windows machine, and hopefully fix it.