I have spent nearly 3 weeks working on an app. Everything was working fine until a moment ago. Here is a description of the problem:
When I type code into the function box, I usually use breaks (enter key) to format my code for readability. This has worked fine until just a moment ago (8/9/2018 around 1500 CT). Now, when I hit enter in the function box, it does not enter a break. Instead, a strange phenomenon:
Google Chrome produces a strange blue box around the function box. Microsoft Edge creates a dotted perimeter around the text box. Neither browser inputs a break into the code.


On Chrome, the blue box seems to emphasize the "Format text" tab. I've tried formatting and unformatting the function-text to see if that would reset some sort of switch, but to no avail.
I can use the keyboard (arrows) to select properties and hit enter to select the property. Enter key works fine in the application during preview (F5) (e.g. I can hit enter to affect changes in textboxes, comboboxes, etc. This is to prove that my enter key indeed works and that it works within the PowerApps interface.
I've closed my app and restarted but it continues to glitch.
I tempted to say this is a spontaneous bug, but I'm also thinking I could have done something silly like a Dell laptop keyboard function-lock or that PowerApps has an obscure feature to prevent breaks that I accidentally activated.
It seems that the function box will accept breaks via cut-and-paste. For the interim, I've had to type code into notepad and cut-and-paste it into the formula box--which is very clunky.
Has anyone else encountered this issue?