For the past few times, I see that my Net Worth Statement’s “Balance History” tab does not show new saved records when I hit “Save” for the “Unlinked Accounts”.
Balance History not being saved when selecting "Save" for the "unlinked accounts" in the New Worth Statement worksheet
Here is an article on using the Net Worth Statement for Manual balances.
Have you tried using Autosave?
Note the above help docs are only for Feed Bot sheets created before August 26, 2019.