The issues with Zomato and Uber have been solved this by going into apps. System apps. Finding the glyph progress app. Clearing it’s cache and storage data. And then disabling and enabling the app.
As for Google calendar, the issue seems to be a bit more complex. I am having the issue with just one of my Google accounts, which as so it happens was my go to personal account. Google calendar glyph countdown is working with calendar entries made to other Google accounts. Also, Calendar entries made to the troubled Google account is for some reason not popping up on the ‘At a Galnce’ widget either.