Ultrex foot pedal hard to push sometimes

I just purchased and installed it 2 weeks ago. It was manufactured in 2020. If I'm actively moving around the pedal works great. If I pause for a few seconds or take my foot off the pedal it will be hard to push when I go to move around again. Is this normal for it to be stiffer to move when it's sat unused for a few seconds? It's not overly hard to push like it's stuck but it is a different feel than when you are moving it consistently back and forth. It's like the electric power steering is either holding it in that position or it's off until I start moving it again. I notice it the most when the foot pedal is flat, all the way forward or all the way back.