ATV3 Different subtitle size according movie aspect ratio

Hi guys,

im getting different soft subtitle size according the aspect ratio (lettered and non-lettered) the size must be the same independently of the movie aspect, take a look the following images there are a huge difference:

Note: The subtitle configuration are the same for the two screenshots.

Non-lettered:

Lettered:

Its any way to solve that, im currently running the version 7.2 of ATV

thks !!!