We surely haven't changed anything in the last week, especially considering the last update was Jan. 25th.
What might have changed in your system during last week (you don't say, so I need to guess), might be the installation of a recent AI Traffic product that, if not configured ( disabling ground services for AI ), will easily surpass the maximum number of objects displayed, causing both objects to disappear, but possibly even disruption to Simconnect itself, which will cause all sort of issues with any add-on.