Unfortunately there is a whole other thread talking about similar issues.
Search for something on the lines of “Assioma becoming erratic“
Specifically for me, I had very similar issue with the UNO, Favero changed the spindle free of charge.
Following this after some months I upgraded to the DUO. One day I changed the pedals to another bike and the right one started systematically underreporting the power which was very frustrating. I ended my rides with a 60% 40% left right power split when usually I am 48% left 52% right. I contacted once again Favero and this time they asked me to ship them the pedals. They have promised to repair them in 10 business days and I am still waiting.
Basically I would contact their support they can make some internal checks on the status of your pedals through the app.
Hope this helps.