Editing an existing core account transaction doesn't work properly

First, the Fidelity brokerage account connection to Quicken is much better than it ever was. Among other things the pricing for holdings is now much more in line, particularly bond transactions.

There is still an issue with tracking core account transactions as separate securities. In the last three or four months, core mmf dividends show as ReinvDiv, which is fine. Purchases of mmf from other dividends don't show, but they never did. Going back a few years, most transactions remain as dividend/purchase pairs. Going further back, many of those have changed to ReinvDiv. Not sure about that, but Ok.

The problem is, if you try and edit an existing core account transaction, it doesn't get saved. Worse, the account balance goes completely haywire—a $100,000 balance might be come $827.50. Let it sit for ten or 15 minutes, and the balance gets corrected automagically. But you still can't edit the existing core transaction, even if you delete it first.