Hierarchical Select and Autocomplete work, but prevent other widgets in block from auto-submitting

When the Hierarchical Select widget is one of the widgets in a Global Filter block that also contains filters for which the "Invoke widget immediately upon select" box has been ticked, e.g. a pop-up calendar and/or a series of check boxes, then these filters no longer auto-submit upon select.

A similar thing is true for core's Autocomplete taxonomy widget. It seems to prevent auto-submit widgets that appear above it on the page, in the same block, from auto-submitting. The auto-submit widgets below it tend to continue to work fine.

So the current workaround is to place Hierarchical Select and Autocomplete widgets in global filter blocks that do not contain widgets that have auto-submit turned on.

Hierarchical Select by itself with the box ticked produces various errors. At the moment you cannot use Hierarchical Select with "Invoke widget immediately upon select" ticked.