Sentry receives many errors about crashes in non-app "reportError"

We have Sentry setup in our Checkout Extensions. We have noticed we get a lot - thousands a day - of errors that look like this:

This says:

[native code] in reportError
[native code] in forEach

As we can’t upload source maps into Sentry it’s difficult to determine how exactly this error is happening.

Has anyone seen anything similar or have any advice on where the problem might lie? Is it a Sentry issue or a Shopify issue?

I don’t know if this is a Sentry issue, so I’ve raised a Sentry issue in their repo: