line 63 of a test projects pwa.js has the following - version 8.0.0.1:
if (trace) onsole.log(‘[pwa.js] Caching all: app shell and content’);
turning on the trace fails due to typo console.log 
Thank you - fixed in next build. Should be out in the next day or so.
Fixed in 8.0.1.
Confirmed 8.0.1.0 and it works as designed now.