PdfRender not rendering thousend separator correctly

[micheleCenci]

When i export a dashboard with some single value graph (using thousend separator option enabled) to pdf, the engine is correctly taking my UI locale "it_IT" and it's correctly formatting the thousend separator (a dot).
When i try to schedule send pdf with mail, the thousend separator is not a dot but a comma, like it's not taking the correct locale.

Can someone provide a solution?

[micheleCenci]

As a support to my questio here are 2 screenshots to put enphasis on the fact that the dashboard correctly format numbers according to the user locale as expect.
In both case if i export the dashboard as pdf the result is identical to the en_GB dashboard screenshot.