Jupyter Notebooks; missing kernels

[fenke]

The Jupyter plugin is often unable to find available Jupyter kernels and/or python environments.

Often - when restarting code or extensions? - VSCode/Jupyter seems to forget the kernel selected for a notebook I am working on. When trying to select an appropriate kernel it will only offer the one on the basic path. I don't know how to fix this and it is rather crippling, there is a reason we use virtual environments.

The available kernels do show up with a jupyter kernelspec list in both the VSCode terminal as wel as general terminals.

What fixes this?