Stacking multiple grp types in the filter bar's filetype/group selection menu

Accessing the filter bar's filetype/group selection menu using either Set TYPEFILTERMENU command or through the Set QUICKFILTER command, I can't stack grp types.

Below, I selected two grp types: html and Images and the file display went blank. The two grp types are in the edit box separated by a"|" character.

If I edit the edit box substituting a space for the "|" then the two groups display.

How can I stack multiple grp types?

Use the Filter Bar's filetype menu (next to the pattern string) to select both groups and it will show you the correct syntax.

In general x|y must be in brackets as (x|y).

Let me try again. The point to me is not the correct syntax.

My point is that Opus does not use the correct syntax when selecting multiple grp types resulting in a blank screen.

I think that Opus should apply the correct syntax when selecting multiple grp types so files in those grp types are displayed.

What are your Filter Bar preferences?

(It doesn't happen for me, but it might depend on the mode.)