Which version is grammatically good?

Since we do not have an issue with the left module of the 3-seater reclining sofa with the normal operating procedure, there might be an issue with the right module; otherwise both will function normally. However, we will check the item one more time and we will follow the operating instructions provided so that we can make sure that the unit is working properly.

Since we do not have an issue with the left module of the 3-seater reclining sofa with the normal operating procedure, there might be an issue with the right module; otherwise both will function normally. However, we will check the item one more time to follow the operating instructions provided so that we can make sure that the unit is working properly.