I am using Quicken for Mac. I have experienced this problems in the last few versions, but since I just upgraded to 8.3.1 from 8.2.1 I do not know yet if this continues to be a problem.
For two of my accounts (a checking and a credit card with BECU), after I update and some transaction is added, on occasion the running balances will all (at least for a few years back) be incorrect (often wildly incorrect, but varies). I have found that if I quit and restart the program, the running balances will go back to being correct. A few times I have had to restart two or three times before the correct balances show up.
The checking account dates back to 2010 (when I first starting using Quicken) and is often where this problem shows up. The credit card only dates back to 2022 but still shows the problem on rare occasion. I have not seen this problem on other accounts, including a PenFed credit card dating back to 2021 and my other BECU accounts. At one time the checking account was set to download transactions after some date, which I reset some years ago to download all available transactions.
Just checking if this is a known issue. I know sporadic bugs like this are difficult to debug, but having incorrect balances show up, even though I know how to repair it, greatly reduces my trust in this program that I have used for so long.