accordign to @Dmitriy this is a bug / i also consider a security breach. experienced this behaviour several times, and it is VERY annoying.
normally, i think there SHOULDN’t be ANY information flow between 2 DIFFERENT user accounts. @Gunner, imagine if once i would log in to my email account from your phone / pc, then, even after i’ve logged out, you would still receive notifications about my email conversations? not too good… at least for me 
sometimes, a friend logged in with his account on my phone to show /ask something, and since then i keep getting notification from his project. it is not possible to stop it, only if you uninstall then reinstall the app.
i have to reinstall the app every time after i help someone remotely to build or setup something in his / her project. this is not good!
@sh.abar.mard, fyi, this issue is not related to latest app version, it is a very old problem. i reported several months ago, but probably it is much older.