DatePicker throwing "Invalid JSON" Exception

I have two DatePickers bound to two distinct DateTime? objects that are not null. When I click on a picker right after having clicked the other, I get the following exception:

Unhandled Exception:
blazor.webassembly.js:1 System.Text.Json.JsonException: Invalid JSON
blazor.webassembly.js:1 at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.EndInvokeJS(JSRuntime jsRuntime, String arguments)
blazor.webassembly.js:1 at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.EndInvokeJS(String argsJson)

Here’s a link to a video of the issue in action:

https://user-images.githubusercontent.com/29260401/116585057-3bd13980-a8d5-11eb-8d41-c2397d0a5b18.mov

Here’s the code:

<DatePicker Label="Photograph Date:" Placeholder="Pick the exact photograph date..." AllowTextInput=@false @bind-Value=@Specifics.PhotographDate />

<DatePicker Label="Sample Date:" Placeholder="Pick the exact sample date..." AllowTextInput=@false @bind-Value=@Specifics.SampleDate />

[limefrogyank]

I think my PR fixes the breaking error, but it’s now highlighting another flaw where the callout that was originally dismissed reopens. It’s not as bad as before, but something we still to fix.

[limefrogyank]

I’m taking a look now.