Hi Tin,
The field is of type "Person or Group" and I have the problem is all my lists that use this field (approx 9-10 lists)
Steps to reproduce (you will need two users to test):
User One: Opens Sharepoint list form and completes the Person or Group field by selecting a user. Continues to fill out form, but does not yet submit.
User two: Completes form and submits/save the form
User one: waits for list in background to refresh, person or group field is now blank in the form and previous selection is removed.
I have just checked and it is still occurring in our forms
Appreciate you looking at this
Thanks