Number Custom Fields (in Forge Manifest) Don't Show Decimals?

I added a custom field with “number” as the type to my Forge manifest file.

However what’s displayed in the custom field on the screen is only the integer portion of the number, without decimals.

When I click the field, the entire number is shown with decimals. As soon as I click away, the decimals disappear and again only the integer portion is displayed.

Is there a way to show the whole number including the decimals?