Thanks Jasmine. I did all of the above and no change. It appears other people have had similar problems with stock holdings starting with an "A", or with a number. They do not appear in the account holdings on the Mobil App. Seems to be a very odd. Is there anything Quicken can do to fix this?
First, please proceed to save a backup (just in case). From there, create a new data file (click here to view instructions, and review the section titled: "Creating a new file"). Once the new file opens, follow the steps below to remove your main data file's cloud account.
After that, switch back to your main data file (click here to view instructions, scroll down and review the section titled: "How to alternate between multiple files").
Once your main file opens, resync your data by navigating to the Mobile & Web tab and clicking on the blue Get Started button, and then the blue Sync Now button and see whether or not the errors you were receiving persist. You can then also delete the new file you previously created as well as its cloud account.
I followed the above steps. No change. Stock holdings that start with an "A", or a number, do not show up in the Mobile app investment account holdings. They all appear in the Windows Desktop program accounts.