Totsbots Flexi Tots leaks

The Flexi Tot was one of my favourite products to use as it's soft, flexible and easy to use. The waistband and velcro is easy to fit and the bamboo lining/ core and liner very absorbent. Even being bamboo it dries quite quickly, relative to other bamboo AIOs. It's also a well-made and finished product. However, the cover is not fully waterproof and leaked. I tried it a few times, just to make sure it wasn't a one-off; however it did this several times.