Universal Containers creates a Community for their end users to access invoices

Universal Containers creates a Community for their end users to access invoices. The invoice pages are mobile responsive and utilise rich text styling for the amount totals in each column. Mobile access to these invoices is important. The “API Enabled” profile permission has been turned on to allow the Salesforce mobile app access to external users with Communities licenses.

Which characteristic of this Community will cause display problems when accessed from the Android mobile device using the Salesforce mobile app?