Caret does not appear at parts of the text editor (Same issue for other challenges as well)

[juliewjwu]

Challenge Name : Add a Submit Button to a Form

https://www.freecodecamp.com/challenges/add-a-submit-button-to-a-form#?solution=%3Clink%20href%3D%22https%3A%2F%2Ffonts.googleapis.com%2Fcss%3Ffamily%3DLobster%22%20rel%3D%22stylesheet%22%20type%3D%22text%2Fcss%22%3E%0A%3Cstyle%3E%0A%20%20.red-text%20%7B%0A%20%20%20%20color%3A%20red%3B%0A%20%20%7D%0A%0A%20%20h2%20%7B%0A%20%20%20%20font-family%3A%20Lobster%2C%20Monospace%3B%0A%20%20%7D%0A%0A%20%20p%20%7B%0A%20%20%20%20font-size%3A%2016px%3B%0A%20%20%20%20font-family%3A%20Monospace%3B%0A%20%20%7D%0A%0A%20%20.thick-green-border%20%7B%0A%20%20%20%20border-color%3A%20green%3B%0A%20%20%20%20border-width%3A%2010px%3B%0A%20%20%20%20border-style%3A%20solid%3B%0A%20%20%20%20border-radius%3A%2050%25%3B%0A%20%20%7D%0A%0A%20%20.smaller-image%20%7B%0A%20%20%20%20width%3A%20100px%3B%0A%20%20%7D%0A%3C%2Fstyle%3E%0A%0A%3Ch2%20class%3D%22red-text%22%3ECatPhotoApp%3C%2Fh2%3E%0A%0A%3Cp%3EClick%20here%20for%20%3Ca%20href%3D%22%23%22%3Ecat%20photos%3C%2Fa%3E.%3C%2Fp%3E%0A%0A%3Ca%20href%3D%22%23%22%3E%3Cimg%20class%3D%22smaller-image%20thick-green-border%22%20alt%3D%22A%20cute%20orange%20cat%20lying%20on%20its%20back%22%20src%3D%22https%3A%2F%2Fbit.ly%2Ffcc-relaxing-cat%22%3E%3C%2Fa%3E%0A%0A%3Cp%3EThings%20cats%20love%3A%3C%2Fp%3E%0A%3Cul%3E%0A%20%20%3Cli%3Ecat%20nip%3C%2Fli%3E%0A%20%20%3Cli%3Elaser%20pointers%3C%2Fli%3E%0A%20%20%3Cli%3Elasagna%3C%2Fli%3E%0A%3C%2Ful%3E%0A%3Cp%3ETop%203%20things%20cats%20hate%3A%3C%2Fp%3E%0A%3Col%3E%0A%20%20%3Cli%3Eflea%20treatment%3C%2Fli%3E%0A%20%20%3Cli%3Ethunder%3C%2Fli%3E%0A%20%20%3Cli%3Eother%20cats%3C%2Fli%3E%0A%3C%2Fol%3E%0A%3Cform%20fccfaa%3D%22%2Fsubmit-cat-photo%22%3E%0A%20%20%3Cinput%20type%3D%22text%22%20placeholder%3D%22cat%20photo%20URL%22%3E%0A%3C%2Fform%3E%0A

Issue Description

1. Load page
2. From line 47 to 49, the caret doesn't appear for text input
3. Arrow keys would not move the caret across the existing text
4. Cannot highlight line 47 and 48

Browser Information

• Browser Name, Version: Chrome Version 49.0.2623.112 m
• Operating System: Windows 7
• Mobile, Desktop, or Tablet: Laptop and Desktop

Your Code

// If relevant, paste all of your challenge code in here

Screenshot

[erictleung]

Possible duplicate of #7847.