Rectangular shaped distortion in the clouds that disturbed clouds when it disappeared

I was making a delivery for work shortly before 10:00 AM on Thursday, June 23rd, 2022 in Iowa City, Iowa. I was on Newton road, close to the VA Hospital as well as many other university buildings and sport complexes. I heard a helicopter flying over me and just glanced up to look. Well to the south of the helicopter’s path and to the west/southwest of where I was, I noticed a strange disturbance in the clouds. There was a rectangular shape over a section of clouds that caught my attention. I can only describe it as what one might think a cloaking devise would look like. Sort of a heat wave look but denser. Best comparison is the movie “Predator” when he uses his cloaking ability. It had very defined edges and was not moving or making any noise. I observed this for about 10 seconds. As I went to retrieve my phone to take a picture, it rapidly recessed towards the middle from all sides, taking the clouds with it. Then it was just gone, but left a void in the clouds where it was and bunching the clouds it disturbed to the middle. I did not see anything take off or fall from the area. Nor did any other portion of the clouds around it move. I did take a picture of what it did to the clouds. By the time I retrieved my phone, the clouds had moved a bit but you can still easily see the shape that this object left. I also attached a map of the area I was at. I marked in yellow where I was. A blue mark for where the object was. Also a red arrow for where the helicopter was and the direction it was traveling.