Every morning I reset the container.
I use the container a lot (Ff & CSS).
As the day goes by, some websites don’t load anymore or some pages are not fully loaded.
As soon as I reset the container everything works again.
In a next version, the container management should be improved.
We are aware of the issue that Microsoft Edge cannot open any website or page when sandboxed.
But we have checked and found that Firefox is working fine which means all the sites are loading properly, so we couldn’t able to reproduce it.
However we will take this to the team notice and update you.