user_data_dir & pyproj.network.set_network_enabled(False)

[WouterDX]

If I install proj-data locally on a windows setup in an anaconda environment, and explicitly set
pyproj.network.set_network_enabled(False)

I would expect there to be no issue.
However, if for some reason user_data_dir contains some cache, and I execute a difficult projection transformation, this apparently fails to use the local proj data folder.

crs_from = 'epsg:31370+5710'
crs_to = '+proj=geocent +ellps=WGS84 +datum=WGS84'
tg = pyproj.transformer.TransformerGroup(crs_from, crs_to)
for tf in tg.transformers:
    print(tf)

Logging as follows:
pyproj info:
pyproj: 3.5.0
PROJ: 9.2.0
data dir: C:\Users\dierckxw\Miniconda3\envs\projenvdata2\Library\share\proj
user_data_dir: C:\Users\dierckxw\AppData\Local/proj
PROJ DATA (recommended version): 1.13
PROJ Database: 1.2
EPSG Database: v10.082 [2023-02-06]
ESRI Database: ArcGIS Pro 3.1 [2023-19-01]
IGNF Database: 3.1.0 [2019-05-24]

System:
python: 3.11.3 | packaged by conda-forge | (main, Apr 6 2023, 08:50:54) [MSC v.1934 64 bit (AMD64)]
executable: C:\Users\dierckxw\Miniconda3\envs\projenvdata2\python.exe
machine: Windows-10-10.0.19045-SP0

Python deps:
certifi: 2022.12.7
Cython: None
setuptools: 67.7.2
pip: 23.1.2
DEBUG:PROJ_DEBUG: pj_open_lib(be_ign_bd72lb72_etrs89lb08.tif): call fopen(C:\Users\dierckxw\AppData\Local/proj\be_ign_bd72lb72_etrs89lb08.tif) - failed
DEBUG:PROJ_DEBUG: pj_open_lib(bd72lb72_etrs89lb08.gsb): call fopen(C:\Users\dierckxw\AppData\Local/proj\bd72lb72_etrs89lb08.gsb) - failed
DEBUG:PROJ_DEBUG: pj_open_lib(be_ign_hBG18.tif): call fopen(C:\Users\dierckxw\AppData\Local/proj\be_ign_hBG18.tif) - failed