In the 9.0 version (V.26951), I think there is a bug with the filters button with the bootstrap template.
In mobile screens (less than 700px wide), if you press the button to filter, the filter works fine the first time, but when you press the second time to change the filter, the filter left panel is not showing anymore. You have to reload the window (F5) to reload again.
Can anyone else confirm this behaviur?
Thanks