I found a version 2.8.7 and installed it. Removing the 3.2 app version and all working great now. Fitbit, you need to fix this. whatever you did from 2.8.7 versus 3.2 broke it for us fitbit one users.
My android took a Fitbit app update within the last week. Now my One won't sync unless I do a hard reboot, and I have to do this every time I want to sync. Come on Fitbit, implement a fix quickly please!