I've been having the same problem for a month+ now. There are two workarounds I've found, neither being stellar. One is to log-out from within the desktop app, and re-login. This unfortunately forces content resync. The second one is to reboot. Which is not ideal given I use my computer for many things that I have open windows spanning days/weeks.
C'mon EN - get with the program. This is unacceptable.