Looker not updating Google Ads accounts listed in data control

Over the years my company has made extensive use of Looker reports, in nearly EVERY report we connect to data from Google Ads using the Google data control.

This past week suddenly connection changes are not being updated reliably. I have a report that I have linked only 3 accounts to, I tried removing one 2 days ago, confirmed it was removed from the data source, and yet here we are days later, & that account is STILL listed in the drop-down menu of linked accounts. I am the owner of both the data source and report.

I can add additional accounts to link to, but the one I removed remains listed. I even tried re-adding it and then removing it again and it still persists. This issue persists across multiple browsers and devices. I don’t want to create yet another data control set. We already have 8 extra sources because Google has not fixed the PDF download bug reported way back in April.