Iron sights are very inaccurate while strafing and firing, with many guns.

Hello @a-weird-bird and thanks for reporting this. The video you provide shows indeed the problem clearly.

This seems to happen with most of the insights of the guns. 

I've found this Reddit comment which also shows the problem quite clearly in two videos.

https://streamable.com/f6rit 

https://streamable.com/gu0v1 slowmotion of weapon

I hope they can look into this! It doesn't seem to have been acknowledged anywhere yet, @EA_Blueberry