This is a weirdness that I do not understand. If I ask for the transaction filter to scan for a particular holding in a particular account it returns zero as the amount. If I double click on the transaction it shows a positive dividend.
If I search for a category "Dividend" I get all the dividends and amounts as I expected. This is for the developer to fix. If you are not getting a response then email the developer Sean. (others have posted his email elsewhere on this forum)
I did try to answer your problem. There really isn't much point in creating the same thread over and over. You can just add to the old one and it bumps to the top.
My hunch is that the Transactions Filter report is geared more towards Categories and / or Bank & Credit Card type of accounts.
If you are looking for Dividend income, try setting the 'Account' parameter of the report to your Income Category for 'Dividends'. You may be able to Sub Total by Payee to help sort things out (or just play around with the Sub Total By setting) Judging by the screenshot on your other post, you're not making use of the 'Description' field. Doing so hinders subtotaling by payee.
The Investment Transactions report might also be worth looking into.