Re-building into existing build output gives strange output (with unexpected file sizes)

[topolarity]

First build:

┌ Warning: The project dependencies or compat requirements have changed since the manifest was last resolved.
│ It is recommended to `Pkg.resolve()` or consider `Pkg.update()` if necessary.
└ @ Pkg.API ~/.julia/juliaup/julia-1.12.2+0.x64.linux.gnu/share/julia/stdlib/v1.12/Pkg/src/API.jl:1255
┌ Warning: The project dependencies or compat requirements have changed since the manifest was last resolved.
│ It is recommended to `Pkg.resolve()` or consider `Pkg.update()` if necessary.
└ @ Pkg.API ~/.julia/juliaup/julia-1.12.2+0.x64.linux.gnu/share/julia/stdlib/v1.12/Pkg/src/API.jl:1255
✓ Compiling...
PackageCompiler: bundled libraries:
  ├── Base:
  │    ├── libLLVM.so.18.1jl - 105.521 MiB
  │    ├── libatomic.so.1.2.0 - 159.875 KiB
  │    ├── libdSFMT.so - 21.602 KiB
  │    ├── libgcc_s.so.1 - 892.930 KiB
  │    ├── libgfortran.so.5.0.0 - 9.553 MiB
  │    ├── libgmp.so.10.5.0 - 707.688 KiB
  │    ├── libgmpxx.so.4.7.0 - 36.445 KiB
  │    ├── libgomp.so.1.0.0 - 1.469 MiB
  │    ├── libjulia-codegen.so.1.12.2 - 77.409 MiB
  │    ├── libjulia-internal.so.1.12.2 - 14.130 MiB
  │    ├── libmpfr.so.6.2.2 - 2.406 MiB
  │    ├── libopenlibm.so.4.0 - 248.109 KiB
  │    ├── libpcre2-8.so.0.13.0 - 663.234 KiB
  │    ├── libquadmath.so.0.0.0 - 966.984 KiB
  │    ├── libssp.so.0.0.0 - 35.555 KiB
  │    ├── libstdc++.so.6.0.33 - 20.357 MiB
  │    ├── libunwind.so.8.1.0 - 504.258 KiB
  │    ├── libuv.so.2.0.0 - 656.695 KiB
  │    ├── libz.so.1.3.1 - 116.062 KiB
  │    ├── libjulia.so.1.12.2 - 246.195 KiB
  ├── Stdlibs:
  │   ├── libblastrampoline_jll
  │   │   ├── libblastrampoline.so.5 - 3.418 MiB
  │   ├── OpenBLAS_jll
  │   │   ├── libopenblas64_.0.3.29.so - 34.150 MiB
  │   ├── SuiteSparse_jll
  │   │   ├── libamd.so.3.3.3 - 38.696 KiB
  │   │   ├── libbtf.so.2.3.2 - 12.875 KiB
  │   │   ├── libcamd.so.3.3.3 - 43.366 KiB
  │   │   ├── libccolamd.so.3.3.4 - 46.604 KiB
  │   │   ├── libcholmod.so.5.3.0 - 2.056 MiB
  │   │   ├── libcolamd.so.3.3.4 - 30.685 KiB
  │   │   ├── libklu.so.2.3.5 - 209.385 KiB
  │   │   ├── libldl.so.3.3.2 - 12.974 KiB
  │   │   ├── librbio.so.4.3.4 - 64.807 KiB
  │   │   ├── libspqr.so.4.3.4 - 425.119 KiB
  │   │   ├── libsuitesparseconfig.so.7.8.3 - 14.906 KiB
  │   │   ├── libumfpack.so.6.3.5 - 805.230 KiB
  Total library file size: 277.268 MiB

subsequently:

~/.julia/bin/juliac --output-exe app_test_exe --bundle build --trim=safe --experimental test/AppProject/
┌ Warning: The project dependencies or compat requirements have changed since the manifest was last resolved.
│ It is recommended to `Pkg.resolve()` or consider `Pkg.update()` if necessary.
└ @ Pkg.API ~/.julia/juliaup/julia-1.12.2+0.x64.linux.gnu/share/julia/stdlib/v1.12/Pkg/src/API.jl:1255
┌ Warning: The project dependencies or compat requirements have changed since the manifest was last resolved.
│ It is recommended to `Pkg.resolve()` or consider `Pkg.update()` if necessary.
└ @ Pkg.API ~/.julia/juliaup/julia-1.12.2+0.x64.linux.gnu/share/julia/stdlib/v1.12/Pkg/src/API.jl:1255
✓ Compiling...
PackageCompiler: bundled libraries:
  ├── Base:
  │    ├── libLLVM.so.18.1jl - 105.521 MiB
  │    ├── libjulia-codegen.so.1.12.2 - 77.409 MiB
  ├── Stdlibs:
  Total library file size: 182.930 MiB