The soldering at least on that IMU is very bad. There is many versions of the board, many manufactures doing them, not all IMUs and boards are fully compatible. Ask from where you bought the board.
You could try to make a support request via the top bar of this page.
I hope, I'm not really late for this. But for others with same issues, I think those are problems with cam/imu synchronization. You could check the cameras IMU sensors here, https://www.aliexpress.com/price/camera-imu_price.html It might help.