I recently switched to HTTPS having no prior experience with GA, GSC, etc. I didn't realize until last week that I had to change the property and view settings in GA accordingly so I did that. I then went to GSC, un linked the HTTP property and linked the HTTPS property to GA. It took a couple of days and then everything synced and seemed normal until the beginning of this week.
The screen shot below shows what should be two of the same graphs displaying data from the HTTPS property - the graph from GSC at the top, and the graph from GA below it (Acquisition -> Search Console -> Landing Pages)
I have not changed any more settings in GA since I linked the HTTPS property, but as you can see the data suddenly drops off completely in the GA graph. The only changes that I have made in GSC are crawl error fixing, and I deleted a test set that I had created just for the purpose of seeing the process (never linked to anything).
QUESTION: Any ideas as to why this could be happening?
FOLLOW UP QUESTION: Is it better practice to create a set for the HTTP and the HTTPS property in GSC so that I can link all of the old AND new data to GA (if in fact it works that way)? Note that when you log into the old search console it says "property sets won't be available after Mar 28th".