Character encoding in facetted plots

[jydarack]

Details

When creating facetted plots, Plots seems to revert to defaults regarding character encoding and/or fontfamily above a certain amount of data.

Minimum reproductible example

ENV["GKS_ENCODING"] = "utf-8"
using Plots
gr(fontfamily="Hiragino Sans")
x = 1:0.1:250
y = sin.(x)
p = plot(x, y)
title!("テスト")
plot(p, p) ## Works fine
plot(p, p, p, p) ## Fails to display the title, uses a monospaced font (Courrier ?) and 
## throws "GKS: glyph missing from current font" and "GKS: invalid bitmap size" warnings

Above example works fine if the upper limit of x is set instead to 100

Backends

This bug occurs on ( insert x below )

Backend	yes	no	untested
gr (default)	X
unicodeplots			X
pythonplot			X
pgfplotsx			X
plotlyjs			X
plotly			X
gaston			X

Versions

Plots.jl version: 1.41.6
Backend version (]st -m <backend(s)>):
Output of versioninfo():

Julia Version 1.12.6
Commit 15346901f00 (2026-04-09 19:20 UTC)
Build Info:
  Official https://julialang.org release
Platform Info:
  OS: macOS (arm64-apple-darwin24.0.0)
  CPU: 8 × Apple M3
  WORD_SIZE: 64
  LLVM: libLLVM-18.1.7 (ORCJIT, apple-m3)
  GC: Built with stock GC
Threads: 1 default, 1 interactive, 1 GC (on 4 virtual cores)