Standalone context interferes with pygame if I don't use with.

[sh1boot]

I wanted to create a standalone context to use under pygame, but whenever I used that context it would break pygame's display and I'd just get a blank screen. I assume that pygame was using gl in its back-end even though I wasn't asking to use its gl context from moderngl.

It turns out I needed to wrap my work in a with context block, which is an idea I got from a random page I saw using it, but I don't really know why. Or more imporantly, I don't know what the rule is saying when or why I should do this. None of the examples do it.

Is this canonical, or is it just a weird, lucky side effect that it made things work in my case?