We’re preparing a fix 
, which will be uploaded soon (expected for tomorrow’s release)- thanks for sharing the matter. It’s related to the visual representation & it doesn’t affect the execution, nor the result. In the meantime, as a workaround, I’d suggest:
- scroll to refresh the page;
- logout/login.
The 
above is relevant only for iPhones (with the latest app version 5.5.28).