Thank you for reporting this.
However, I cannot be sure what is causing the issue you are experiencing as it is very important to know how exactly you have implemented the described scenario. For example, I don't know when you are adding slides and when you are removing them. There is a possibility that the element that started the touchstart event was removed before throwing the touchend event, but I cannot be sure this is the cause.
Can you please send us a sample app, where this can be reproduced? Alternatively, you can open a support ticket and send us your app or your app name if you are developing it in the In-Browser Client or the Windows Client. Having an example will greatly help us to investigate the issue and provide a solution.
I am looking forward to your reply.