one digit of physically digital output not working well

Good morning
Dire sir

I am using freelance 2013 ACS900F and I have a problem with one of the logic output points when I give drive command the signal in the physical output point is blinking and not continuous even though all the conditions in the FB (Individual drive function) are all correct. PR0 = 0 IN = 1 LOC = 0 AND AFTER THE FEEDBACK COME THE FB1 = 1 FB0 = 0 FLT = 0 OUT = 1 (CONTINUOUSLY) BUT OUTPUT in the physically digital output IS BLINKING I have changed the logical output point to another card and also changed the Individual drive function (IDF), but the result is same not changed. Can you explain this strange phenomenon to me, please?

Thank you so much

Best regards