ASP.Net core Model's date property is blank in edit mode - asp.net-core

Question

I have a Razor pages web app and one of the models' is for colleague info and includes their date of birth.
When I look at the scaffolded pages for a colleague, the Date of Birth field is populated in the details page but not the edit page.
Images below will show what I mean.
Here is the Details page
And here is the Edit page
As you will know, as the Edit page is blank, If I change another field e.g. Staff Position and save, the DOB for the colleague becomes null.
As I say the pages are from the EF Core scaffolding so I believe the HTML for the form should be correct.
Edit Page HTML
<div class="form-group">
<label asp-for="Colleague.DateOfBirth" class="control-label"></label>
<input asp-for="Colleague.DateOfBirth" class="form-control" />
<span asp-validation-for="Colleague.DateOfBirth" class="text-danger"></span>
</div>
Colleague is a bind Property of the Colleague model in the Page Model. ALl other fields, as seen in the image populate fine.
Update
As I say it is using Model Binding
[BindProperty]
public Colleague Colleague { get; set; }
OnPost
public async Task<IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return Page();
}
_context.Attach(Colleague).State = EntityState.Modified;
try
{
selectedBranch = Colleague.BranchID;
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!ColleagueExists(Colleague.ColleagueID))
{
return NotFound();
}
else
{
throw;
}
}
return RedirectToPage("../BranchColleagues", new { id = selectedBranch });
}
[DataType(DataType.Date)]
[Display(Name = "Date of Birth")]
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
public DateTime? DateOfBirth { get; set; }

Answer 1

I also faced the same problem. It works while I use .Value in input tag
<input asp-for="Colleague.DateOfBirth.Value" class="form-control" />

Answer 2

I am placing my quick fix solution as the question has been empty now for a month.
By removing this annotation from the POCO class:
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
The date value now appears in the edit form as required.