This is not a new issue, but persisted since the beginning of Dropbox Paper.
Here is an example of how it loads:
Notice: the lack of a header bar. This is also frequently accompanied by a "Waiting for connection..." message at the bottom. In this state, either nothing works, or it says it can't save changes because it has no connection.
If I close enough Dropbox tabs, sometimes it will start working again. But that's not always the problem.
Signing in and out also does not solve the problem.
Even restarting Chrome does not solve the problem
Visting chrome://net-internals/#sockets closing/flushing idle sockets does sometimes solve the problem, but not always
Using a different browser WILL solve the problem, but it's a super annoying workaround.
Is there a max connection problem in Dropbox Paper such that you can't have more than 10 Dropbox Paper tabs open at the same time? Any plans to fix it?