I isolated the issue: There is something in this Regex expression that is interacting strangely with Bubble and making the text box elements invisible across all iOS devices (everything looks fine on Android and other devices). When the expression is temporarily taken out, everything is visible on iOS again.
If you’re a Bubble dev with some Regex knowledge and looking to get hired to do a contract to solve what part of this expression needs to be changed to fix the issue, PM me 
