SharePoint display names and emails not showing

Hello, I recently setup an IT helpdesk application on SharePoint 2013, The Helpdesk application has some boxes where a user can enter their username, another box where an IT member can enter the name of tech to whom the helpdesk request is assigned. I created workflows that automatically send emails to users who's username is listed in those boxes.

Everything worked fine for a while but recently I noticed an issue. The username includes additional characters such as

 
i:0#.w|domain\username

Also when I check the emails sent in Outlook I see that in the To: box instead of showing the Display Name of the user it shows some characters followed by the Display name.

71; #Display Name

I googled this and discovered that it has something to do with Claims based authentication, my question is why did it start happening by itself, it was fine a couple weeks ago. Also, how do I fix it.

I very much appreciate any help.

Thanks!

Newaves
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NewAvenuesAsked:
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NewAvenuesAuthor Commented:
No one responded to my question :(

But I figured out the problem myself. I made a mistake when creating the workflow.

My list contains a box "Requested By:" this is where the user fills in their username or the username of whomever is experiencing the issue. The list contains another box "Assigned To" in this box the helpdesk manager enters the name of the user to whom the helpdesk issue is assigned.

I created workflows in SharePoint Designer, where depending on the status of the helpdesk request an email is sent out to either the user in "Requested By" field or to the user in "Assigned To" field, my mistake was that when adding the "Requested By" or "Assigned To" to the TO: box of the email form, I chose for it display as string. I changed that so it displays as Display Name and this fixed the issue.

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