Describe the issue

I don't really have a good explanation for this one, despite how long I spent narrowing down this bug. I have a reproduction, here are the steps:

• open the repro, wait until you see the diagnostics appear
• place your cursor after "hello", but before the closing parenthesis
• type whatever you want, preferably something long
• check the log, you should see views logged with no parents

I'm fairly confident this is the source of a lot of bugs, some of our nastiest ones. It may be performance sensitive as it doesn't always work.

Here is a video demonstrating the repro:

Browser and platform

Chrome, Firefox

Reproduction link

https://codemirror.net/try/?c=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