Any issues directly attributed to the MatterControl software, contact MatterHackers directly for support.
By directly contacting MatterHackers you can be assured that they will incorporate your issue into future improvements of the Touch interface.
You may also try clearing the cache and searching this support page but if neither are effective MatterHackers support can assist with the greatest level of expertise.
Their contact information is:
phone: (949) 613-5838 (10am-6pm PT Mon-Fri)