Files saved with savefig not display Legend Group Titles

[Straehlc]

Describe the bug
When saving a plot which contains legend groups and legend group titles, the legend group title go missing in the output file depending on file type. PNG and PDF have no legend group titles, while the HTML retains those.
While saving a PNG from the html does work and the legend group titles are visible.
Code I used:
`
using PlotlyJS

p = Plot()
add_trace!(p,scatter(x=1:100,y=rand(100),name="1",legendgroup="group",legendgrouptitle_text="First Group"))
add_trace!(p,scatter(x=1:100,y=rand(100),name="1",legendgroup="group"))
add_trace!(p,scatter(x=1:100,y=rand(100),name="1",legendgroup="group2",legendgrouptitle_text="Second Group"))

savefig(p,"test.html")
savefig(p,"test.png")
`

Version info
On Windows 10
Please provide the following:

1. output of julia command versioninfo()

Julia Version 1.8.2
Commit 36034abf26 (2022-09-29 15:21 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: 8 × Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-13.0.1 (ORCJIT, skylake)
Threads: 1 on 8 virtual cores
Environment:
JULIA_EDITOR = code
JULIA_NUM_THREADS =

2. Output running the following in Julia 0.7 or greater: using Pkg; pkg"status" (if you are on Julia 0.6 or earlier run Pkg.status())

[336ed68f] CSV v0.10.7
[a93c6f00] DataFrames v1.4.4
[7a1cc6ca] FFTW v1.5.0
[38e38edf] GLM v1.8.1
[7073ff75] IJulia v1.23.3
[23992714] MAT v0.10.3
[f0f68f2c] PlotlyJS v0.18.10
[91a5bcdd] Plots v1.36.6
[92933f4c] ProgressMeter v1.7.2
[5bab7191] SPICE v0.2.3

Directly save to PNG using savefig:

Saved from html:

[pawbz]

It would be nice if this could be resolved. Facing the same issue. The legendgrouptitle_text is replaced with Aa before saving as e.g., PDF.

[qdddddd]

Same issue here saving as SVG.