Still buggy, more than a month later. Wahoo Fitness used to be the most stable activity app I'd used, but now it glitches randomly. Same issues trying to run a Tickr heart monitor. I can get heart rate or speed but not both reliably. It'll quit and lose logs.
Until this is sorted out I'm carrying both my Android and iPhone to record direct to Strava, sans Tickr, and running the second phone with Tickr enabled but generally losing any GPS data. PITA.
One problem I noticed is the app would randomly reset GPS to "off". So I have to remember to check it every time. Even then there are too many glitches, so I'm back to recording directly to Strava. If Wahoo doesn't sort it out soon I may go back to a Cyclemeter subscription.