1

I have dashboard where I’m trying to use global multi-filter together with global parameters.
And in this case global multi-filter doesn’t work.

If I remove global multi-filter - global parameters work just fine,
If I remove global parameters - global multi-filter also work just fine,
If I combine them together - global multi-filter stop working, but separate filters per widget still working.

2

Yes, you can track this issue for progress (when there will be one):

And previous discussion: Dashboard filters have no effect