We have heard of this very occasionally happening with some customers. We advise you to check with your doctor if you are concerned.
In our experience, it’s not something that continues long term. The normal explanation is that the body is releasing water / holding on to less water. It’s likely, therefore, actually a good sign.
Of course, stop taking and check with your doctor if it is concerning you but in our experience, it is reasonably rare and normally stops after a few days.