closed - Dialog box and select markup

closed - Dialog box and select markup

Good morning.

For any reasons, it seems that jQuery Dialog impacts select behaviors:

a standard select works well
a standard select works well on Safari and Chrome (Linux) with Dialog (modal=true)
a standard select does not work well on Firefox (Linux and Windows) and Chrome(Windows)  with Dialog (modal=true)

version tested: JQuery 1.7. UI 1.10.2 and even downgrade to 1.8.11

by  does not work we, I mean: the select dropdown is automatically closed. The only way to keep it open is to maintain on the left click of the mouse.

I never faced this before so I am quite lost. 

I tried to see if _focusTabbable was the reason but even commenting it or downgrading to 1.8.11 did not fix this.