Toolbar drop down items not working (selection ignored)

Version: / LibreOffice Community
Build ID: 20(Build:2)
CPU threads: 8; OS: FreeBSD 13.0; UI render: default; VCL: qt5 (cairo+xcb)
Locale: en-US (C.UTF-8); UI: en-US
Calc: threaded

This is a new installation. None of the drop down widgets work across all of LO. For example, if I click on the down arrow next to the current font size it will show the list, but no matter what I click on it will revert to the prior value. The only way I can get a new value to take is if I click to the left of the arrow and either scroll to select a value or type a new value and press [enter] to get it to take. Similarly, if I try to select a new font color, the color selector box just disappears and no change is made.

This happens for all of the drop down controls such as Set Paragraph Style, Font Name, Font Color and Character Highlighting Color.

Controls that pop up a menu (New, Open, Save, etc.) work just fine.

I tried turning off “Use hardware acceleration” in Tools > Options > LibreOffice > View, but that had no effect.

Please try the first steps.

Thanks. SAL_USE_VCLPLUGIN=gen made it switch from qt5 to x11, and now all seems well.