....and this is why sticking duct tape over the problem isn't a great idea.
The root cause of the problem is refurbing yet again a venerable antique with a shite wing design originally intended for turbojets. The 737 wing has suffered horrific performance ever since high-bypass fanjets became a requirement and moving to ever larger engines hasn't improved it.
If Boeing had done the right thing, phased out the 737 and built a replacement when the problems started to become obvious years ago, we wouldn't be where we are.