@torgosPizza I used the patch and created a test module using the code in #7....

@torgosPizza I used the patch and created a test module using the code in #7. I was randomly checking, and at one moment the cart update functionality was breaking. I then disabled the test module, and then it started working properly. I then again tried to reproduce the abnormality by enabling the module, but was not able to replicate it.

I think we should write automated tests first #2568855: Write tests before committing this into the module.