Hi @R.J.Saunders, I seem to be able to enter multi-lines on my end:
https://cl.ly/3E460a2f2I2l/Screen%20Recording%202018-04-01%20at%2001.11%20PM.mov
Could you help to share the read-only link to the site: Share a read-only link | Webflow University.
Also, if you can help to share the page and which form? Screenshots help, here is a good tool: https://getcloudapp.com
Thanks in advance