As a fan of the Google Play desktop app, these Electron wrappers around Google apps are really flaky and hard to maintain. Google is motivated to break these implementations since they live outside of their direct web ecosystem, and when they break it always takes some time to recover since it's open-source. So you end up still using the browser solution.
What's additionally weird is that you can pull your tabs apart into separate windows to replicate this exact behavior. It's hard to justify why I need an exclusive browser just for one app. For Play it's justified because of tighter integrations with the OS playback keys that the browsers historically have been flaky with, especially when you're using other apps.