That’s bug, unfortunately, but we’ve entered a report for it and just have to wait until it gets addressed. For now, setting up your shortcuts is only way you’ll be able to use a Standalone process for testing multiplayer (by opening shortcut twice, one for server and one for client, for example).
This shouldn’t happen in a packaged game; bug appears to be an editor-only issue.
Not sure about Bloom, exactly. You can open a new post for that, though, and I’ll make sure we get right people to look into it.