bug when I have 2 tabs with the same title

It's not very critical but I founded some bugs in panels tabs (or panels ?). When you have 2 contents in your panel page with the same title and both are displayed in regions where the display setting is tabs (not necessary in the same region or even in the same mini-panels), you'll have some display bug (yes I know it's not really common but you can have this kind of situation sometime).

For exemple
- create a panels page. Add two regions (region 1 and 2).
- Add for each region, 2 contents (content 1 and 2).
- For the content 1 in the region 1, go to settings and override title (e.g title). Do it the same think for the content 1 in the region 2.
- For the content 2 in region 1 and 2, put whatever you want for the title.
- Parameter display's option for each region as tabs.

As you can see, when you play with tabs, you'll have some bugs (see screenshot I attached with this issue.
screenshot 1 => in region 1, "test" tab focus / in region 2, "test" tab focus => everything is ok
screenshot 2 => in region 2, "test 1" tab focus / in region 2, "test" tab focus => everything is ok
screenshot 3 => in region 1, "test 1" tab focus / in region 2, "test 2" tab focus => why the content in my region disappear ??? And why the content of my "test" tab in my region didn't disappear ???
screenshot 4 => in region 1, "test" tab focus / in region 2, "test 2" tab focus => I have always a display problem in my region 2.

Ok, I'm little bit pervers with this bug :). Hope to help you to improve this module :).