What is the bug or the crash?
You can see that the temporary layers created to showcase another detected bug seems not to be displayed on the canvas :

Entities are well defined in the attribute table and they can be edited and moved through the QGIS tools, they are just invisible to the human eye. I tried to change symbology but with no success.
Steps to reproduce the issue
QGIS 3.28+ New profile, new project, add new virtual layers

Versions
Version de QGIS
3.28.4-Firenze
Révision du code
fd0fb72
Version de Qt
5.15.3
Version de Python
3.9.5
Version de GDAL/OGR
3.6.2
Version de Proj
9.1.1
Version de la base de données du registre EPSG
v10.076 (2022-08-31)
Version de GEOS
3.11.1-CAPI-1.17.1
Version de SQLite
3.39.4
Version de PDAL
2.4.3
Version du client PostgreSQL
unknown
Version de SpatiaLite
5.0.1
Version de QWT
6.1.6
Version de QScintilla2
2.13.1
Version de l'OS
Windows 10 Version 2009
Extensions Python actives
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
processing
2.12.99
sagaprovider
2.12.99
Supported QGIS version
New profile
Additional context
No response
What is the bug or the crash?
You can see that the temporary layers created to showcase another detected bug seems not to be displayed on the canvas :
Entities are well defined in the attribute table and they can be edited and moved through the QGIS tools, they are just invisible to the human eye. I tried to change symbology but with no success.
Steps to reproduce the issue
QGIS 3.28+ New profile, new project, add new virtual layers
Versions
Version de QGIS
3.28.4-Firenze
Révision du code
fd0fb72
Version de Qt
5.15.3
Version de Python
3.9.5
Version de GDAL/OGR
3.6.2
Version de Proj
9.1.1
Version de la base de données du registre EPSG
v10.076 (2022-08-31)
Version de GEOS
3.11.1-CAPI-1.17.1
Version de SQLite
3.39.4
Version de PDAL
2.4.3
Version du client PostgreSQL
unknown
Version de SpatiaLite
5.0.1
Version de QWT
6.1.6
Version de QScintilla2
2.13.1
Version de l'OS
Windows 10 Version 2009
Extensions Python actives
db_manager
0.1.20
grassprovider
2.12.99
MetaSearch
0.3.6
processing
2.12.99
sagaprovider
2.12.99
Supported QGIS version
New profile
Additional context
No response