Some of our users are running into memory issues which weren't happening on 1.8.0. I can also confirm that we were able to resolve these issues by downgrading back to 1.8.0.

Some of the console errors when this issue happens:

Database closed

Out of bounds call_indirect

Out of bounds memory access (evaluating 'e.apply(null,s)')

Happens in Safari (Mac), Chrome (Mac & Windows), Edge (Windows), so not an implementation issue, I think.

From some quick Googling it looks like an Emscripten build configuration thing, but I have to admit that I'm absolutely clueless about these things.

If I can do anything more specific to help set up a test case, happy to hear how I can help better.