Hi,
Thanks for introducing Screaming Frog. very usefull!
It seems the GA is properly installed. I've checked most of our pages through this Chrome extension: https://chrome.google.com/webstore/detail/google-analytics-debugger/jnkmfdileelhofjcijamephohjechhna
I spent a long time searching a possible change taking place right around the time this drop append and also tried to pinpoint the drop to a specific audience, region, system type etc. But no luck. It seems the increase in amount of sessions and the drop in session duration is consistent throughout all regions, devices, acquisition channels etc.
Check out the enclosed screen shot. it literally append over night.
Looking on exit pages, I don't see a pattern. There's an increase on the amount of exists (sines we have more overall sessions) but the exists are distribute across all pages.
I would appreciate your help...!