Juki dln-5410n-7 tension discs don’t release when foot up

Hi. Me again.
After seeing a little bit my thread started to break, I changed needle but still the same. Then I realized that my tension discs doesn’t release when I lift the presser foot up, not manually and not when lifted by the pedal. The only time when they release for a sec is when I trim the thread by the heal function. Is this normal ? I also noticed that even when tension was set to almost nothing , tension was still very tight.

Does anyone had something similar happening?