Comma in "From" email name causes WSOD on "thank you page" memory overload

A comma in the "from name" on the "Thank you and receipting" page of Contribution page will cause a WSOD out of memory error. I don't think this was was not the case with 3.1, but it sure is with 3.2 - after the upgrade to 3.2 the thank you page stopped working. After a couple hours of debugging a comma was determined as the cause of the failure.

I can recreate if you want to on my server with a video if you need to see it in action.

recommend escaping the , or validating the field

PS. I raised PHP memory all the way to 512MB, still out of memory error occurs. memory limit is NOT the problem.