Crashes iPhone 6; Auto-pause still buggy

Last 4 weeks it repeatedly crashes iPhone on long runs (sometimes as early as 8 miles, usually in the 13-15 mile range). Phone just shuts off.

Main new feature in update was improved auto pause. Went from working pretty well to completely broke. Fails to pause sometimes, fails to restart others. Completely messed with pacing. Even worse when its in a hydration pack as opposed to arm band.

Keeps getting worse.

Senort01 about Runtastic Running Tracker PRO, v6.8