I took a look at your project.
I was having a little trouble following what you were trying to do with your blocks. I added a few block for the LONG CLICK events that save data to a cloud variable then retrieve it into the list control. I Think that is what you were trying to do.
You might also try getting the screen to work using either APP or STORED variables, then move them to the cloud. That way you can determine if the problem is with the cloud/firebase connection or your other blocks.
I hope that helps.
