This is a physiological disease (not infection like fungus – but a management issue) normally caused by too cool temperatures (anything below 15C or 62F) when the fruit is setting pollen. It normally occurs on the first fruit set (the lowest fruiting branch or what we call a “truss”) and not on subsequent ones. If you see it on subsequent or higher fruit trusses, the problem is usually too high nitrogen causing excessive growth.
On occasion, it can be caused by over-pruning of overgrown plants. (Another reason to keep the plants well pruned from the beginning)
It can also be caused by exposure to lawn chemicals such as 2-4-D but then you’ll also have withering leaves. Without the withering leaves, it’s environmental.
The solution in the garden is to plant later, plant slightly smaller varieties (the largest varieties tend to be more susceptible to the problem) and to make sure the plants are being grown properly. If it’s a late frost, cover with a frost fabric.
Zippering is a form of catfacing and this is a line that looks like a brown scabby zipper running vertically on the fruit. Often it will also contain a hole on the side of the plant. Again, the causes are the same as catfacing and there’s nothing to be done about it. The fruit is still quite edible.