gui_metadata fix

[bradcarman]

Checklist

• Appropriate tests were added
• Any code changes were done in a way that does not break public API
• All documentation related to code changes were updated
• The new code follows the
  contributor guidelines, in particular the SciML Style Guide and
  COLPRAC.
• Any new documentation only uses public API

Additional context

Fixes #3983

[github-actions]

Benchmark Results (Julia vlts)

Time benchmarks

	master	f5afef5...	master / f5afef5...
ODEProblem	0.096 ± 0.0062 s	0.0956 ± 0.0058 s	1 ± 0.089
init	0.0574 ± 0.0015 ms	0.0569 ± 0.0015 ms	1.01 ± 0.036
large_parameter_init/ODEProblem	1.09 ± 0.0032 s	1.08 ± 0.0015 s	1.01 ± 0.0033
large_parameter_init/init	0.108 ± 0.0025 ms	0.107 ± 0.0022 ms	1.01 ± 0.032
mtkcompile	0.0342 ± 0.00085 s	0.034 ± 0.00077 s	1 ± 0.034
time_to_load	4.91 ± 0.046 s	4.89 ± 0.033 s	1 ± 0.012

Memory benchmarks

	master	f5afef5...	master / f5afef5...
ODEProblem	0.708 M allocs: 23.8 MB	0.708 M allocs: 23.9 MB	0.999
init	0.892 k allocs: 0.0461 MB	0.892 k allocs: 0.0461 MB	1
large_parameter_init/ODEProblem	4.5 M allocs: 0.173 GB	4.53 M allocs: 0.174 GB	0.992
large_parameter_init/init	1.74 k allocs: 0.0857 MB	1.74 k allocs: 0.0857 MB	1
mtkcompile	0.237 M allocs: 8.75 MB	0.237 M allocs: 8.75 MB	1
time_to_load	0.153 k allocs: 14.5 kB	0.153 k allocs: 14.5 kB	1

[github-actions]

Benchmark Results (Julia v1)

Time benchmarks

	master	f5afef5...	master / f5afef5...
ODEProblem	0.103 ± 0.0072 s	0.103 ± 0.007 s	1 ± 0.098
init	0.0437 ± 0.011 ms	0.0437 ± 0.011 ms	1 ± 0.36
large_parameter_init/ODEProblem	1.31 ± 0.025 s	1.27 ± 0.038 s	1.03 ± 0.036
large_parameter_init/init	0.0774 ± 0.016 ms	0.0768 ± 0.016 ms	1.01 ± 0.29
mtkcompile	0.0358 ± 0.0014 s	0.0363 ± 0.00089 s	0.986 ± 0.044
time_to_load	4.55 ± 0.0098 s	4.51 ± 0.021 s	1.01 ± 0.0051

Memory benchmarks

	master	f5afef5...	master / f5afef5...
ODEProblem	0.722 M allocs: 23.7 MB	0.72 M allocs: 23.6 MB	1
init	0.797 k allocs: 30.6 kB	0.797 k allocs: 30.6 kB	1
large_parameter_init/ODEProblem	4.78 M allocs: 0.174 GB	4.81 M allocs: 0.175 GB	0.991
large_parameter_init/init	1.64 k allocs: 0.0596 MB	1.64 k allocs: 0.0596 MB	1
mtkcompile	0.242 M allocs: 8.22 MB	0.242 M allocs: 8.22 MB	1
time_to_load	0.149 k allocs: 11.1 kB	0.149 k allocs: 11.1 kB	1