We hired a few staff at the beginning of the year that were in their mid-20s and this was their first full-time job. They came into the office for about a month before we were sent to work from home. 1 of them, who we were really impressed with at the interview showed some bad habit signs from the get go. My Director walked by her cube on her first or second day and she had her feet on the desk and was browsing her phone. When we started working from home, during our weekly check-ins she would either log in late or not at all. When we came back to the office full-time, she wouldn't produce work on the deadline and was constantly late. We eventually let her go.
The other guy, our 2nd choice, is awesome and is doing fine. Always on time, always asking questions after he's researched and still doesn't understand the subject and his work product (staff reports) has been great.
Honestly, for the one we let go, if we hadn't been sent home to work, we may have been able to identify the work habits and helped correct it. Being their first time job and having the ability to WFH, probably encouraged them to slack off and create some bad work habits.