problems with dropdowns in VM 4.6.8.11258 in Joomla 6.1

[patbe60]

The settings in the VM configuration "Use jQuery chosen for dropdowns in FE" take no effect. The dropdowns always use Choices js even when the settings are "None".
I am aware that this VM version is not made for Joomla 6, I tried it just to see what happens. Most of the functions work fine.
Version 4.9.3 can't be installed. I always get an internal server error. That's why I tried versionb 4.6.8.