Transactions Disappear

I balance my Quicken every other day to stay on top of my finances. Last Wednesday (a week ago), I took time to ensure that every transaction was in my registers and recreated those that were not. Today, 8 days later, I found that transactions were again missing. These were there last week. The transaction still appears in my credit card as a completed payment but, when I try to "Go to Matching Transaction," I get an error message that the transaction does not exist. Future transactions are gone. Past transactions are gone. I cannot trust my Quicken balance anymore. I have used Quicken for 25 years and this web version is not your best work. I researched it last week and the solution was to run Validate and, if still having problems, run the Super (secret) Validate. I did these 8 days ago. It apparently did nothing to help. I am running updated Windows 11 and the updated version of Quicken. For the amount of money you're charging, I should have to spend my evenings confirming every transaction is still in my register.