Just something to keep an eye on, it passed the last 200 runs on the bots.

Here is a subset of the local log:
Exception: AssertionFailedException
Reason: Assertion 'assertWithMatcher:(kindOfClass("UIScrollView") && contentOffset)' failed.
Element matcher: web view scroll view
Complete Error: Error Domain=com.google.earlgrey.ElementInteractionErrorDomain Code=2 "UI element '<WKScrollView: 0x7f85f0803a00; baseClass = UIWebScrollView; frame = (0 0; 414 672); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x7f85edd01d70>; layer = <CALayer: 0x7f85edd02420>; contentOffset: {0, 40}; contentSize: {414, 6068}>' failed to match contentOffset" UserInfo={NSLocalizedDescription=UI element '<WKScrollView: 0x7f85f0803a00; baseClass = UIWebScrollView; frame = (0 0; 414 672); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x7f85edd01d70>; layer = <CALayer: 0x7f85edd02420>; contentOffset: {0, 40}; contentSize: {414, 6068}>' failed to match contentOffset}