I have a urostomy. I was having a terrible time with leaks, sometimes having to change a bag 2 times in one day, 5 times in 3 days. I was constantly doing laundry!It was frustrating. I finally tried the barrier strips and haven't had an issue since!
There is no reason for any ostomy to leak, there are so many products out there concave, convex, you should never have a problem with leaking. If you can contact your supplier they should be able to help you.