MDAL does not release (netcdf/mesh) file when layer unloaded from QGIS?

What is the bug or the crash?

Having a little python script here which creates an ugrid.nc I see that QGIS after loading a mesh (and then unloading it) keeps a file open apparently (checked with lsof).

Steps to reproduce the issue

Create a fresh netcdf
Load it in QGIS
Unload the layer (or new project)
Try to write the netcdf again (no permission because QGIS still having it in it's claws)
test with lsof

Tested it with a shp file, and then one is just released after the unloading of the layer.

Versions

QGIS version	3.27.0-Master	QGIS code revision	415c545bae3
Qt version	5.15.4
Python version	3.10.5
GDAL/OGR version	3.5.0
PROJ version	9.0.1
EPSG Registry database version	v10.064 (2022-05-19)
GEOS version	3.10.3-CAPI-1.16.1
SQLite version	3.38.5
PostgreSQL client version	unknown
SpatiaLite version	5.0.1
QWT version	6.1.4
QScintilla2 version	2.11.6
OS version	Debian GNU/Linux bookworm/sid

Supported QGIS version

[ ] I'm running a supported QGIS version according to the roadmap.

New profile

[X] I tried with a new QGIS profile

Additional context

If needed I can provide a small test python script which actually writes the nc file

qgis / QGIS

MDAL does not release (netcdf/mesh) file when layer unloaded from QGIS? #49215