Amaya 8.7.1/9.0 possible bug: character entities in a form value attribute

Hi,

As I understand, a character entity can be defined using names or codes. 
For instance, the Greek delta character can be inserted in a page using 
Δ or Δ

Amaya displays the Greek delta character in the following button:
   <input type="submit" value="abc&Delta;" />
but does not display the Greek delta character in the following button:
   <input type="submit" value="abc&#x394;" />
(Moreover, if the user adds some text to the value attribute, the 
character entity is lost when the document is saved.)

It seems that Amaya understand character entities defined by code 
numbers, not by words in the value attribute.

Best regards,
Bartolomé Sintes