I have a really simple flow that runs successfully but somehow the sharepoint list doesn't update.

Detailed view:

The flow should basically get all itens from my list and populate the column "Teste" with "Teste".
After I run the flow, the output from the Update Item shows as if the column was updated:

My list's "Modified at" is updated with the time the flow ran:

But my "Teste" column is still blank:

I've already spent around 3 hours trying to figure this out by searching on topics or youtube videos and nothing.
Can anyone spot what I'm doing wrong?