Investigate grpc crash

[denrase]

:scroll: Description

:bulb: Motivation and Context

Relates to #229

:green_heart: How did you test it?

:pencil: Checklist

• [ ] I reviewed submitted code
• [ ] I added tests to verify changes
• [ ] I updated the docs if needed
• [ ] All tests passing
• [ ] No breaking changes

:crystal_ball: Next steps

[github-actions[bot]]

	Fails
:no_entry_sign:	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- Investigate grpc crash ([#232](https://github.com/getsentry/sentry-dart-plugin/pull/232))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

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