Google & YouTube

Hi, sorry you're still having issues. I see that our support agent has already responded to your ticket and at least some of these issues are now fixed. If you are having shipping disapprovals, make sure your Shipping Sync settings are configured in the App as you expect. "Automatic" will allow the app to pull your Shopify configured rates into Google, while "Manual" means you will set it up yourself in Merchant Center and the app won't copy any shipping over for you.
When we see data attributes coming and going, the issue is often multiple data sources trying to update your products in Google. The app is handling a lot of the product sync logic already for you, so you may want to check and see if you have any other third party product handlers also trying to sync products. When the app and your other third party are both turned on, they may cause data conflicts, or "data flipflopping" back and forth seemingly randomly. This is because the app is telling Google some product information, then your other third party also tries to tell Google something slightly different on the same product, and you'll see Google's data go back and forth, like a gremlin.
Hopefully this helps, and if not, feel free to write back in on your existing case, but the Shipping settings and second product sync service seem to be most of the issues you had last month.