Hi Andrew,
Is it possible that you might have given control to the "Layer Order" Panel?
https://docs.qgis.org/3.34/en/docs/user_manual/introduction/general_tools.html#layer-order-panel
Your description sounds a bit like that.
regards
Werner
On Wed, Dec 18, 2024 at 1:02 PM Andrew Chapman via QG
Having recently come back to QGIS after not using it for several years, I'm
unable to get to a problem with new shapefiles that I try to create.
I'm using 3.34.0 but have tried 3.40.1 with the same results. I've been
investigating for a while and tried to simplify.
I create a simple test file
