I'm one of the co-founders of Soomla. I just checked on a few apps that use Soomla stores and couldn't replicate the problem? Do you mind submitting this through our support channel. If you are using the open framework, you can post it as an Issue on Github. There are many community members who love to help as well as team members who monitor the issues. If you are using the store-front product, you can send it directly to support@soom.la.
Either way please include a log and some more information about the setup. os, device, is the behavior consistent or there is something that triggers it?