[SOLVED] Dropdown userfields are not identified as required if not selected

[SteP[IT]]

I'm experiencing an issue in user subscribe form: all fields are correctly identified as required when left empty during subscription, but not any dropdown one!
In that condition, user can subscribe without selecting the proper country and city, having thus problems when buying something.
Could please someone help me to identify and correct that asap?
Using Joomla 3.6.0.2 and VM 3.0.16
Thank you in advance
Regards

[SteP[IT]]

In addition to that issue, when missing country and/or city, the user is being recorded in Joomla users db table only, and no entry is recorded in VM userinfos table.
Please, could you verify this issue is confirmed, and if yes give a fix?
Regards

[SteP[IT]]

OK, found the problem: VM jQuery Chosen can't be disabled in VM Config
I had it unchecked and all was working ok in previous Joomla-VM versions... it may be now that it's required to be checked?

Regards

[Milbo]

There is also a new js in the new vm3.0.17, please test the last http://dev.virtuemart.net/attachments/download/1010/com_virtuemart.3.0.17.4_extract_first.zip

[SteP[IT]]

OK, I'll do that & make report soon
And thank you Milbo for your usual fast way to also follow "sometimes boring" users 

[Milbo]

Is it solved now?

[SteP[IT]]

I had no time to verify it, being busy on urgent task.
I hope to have time to get it within this week.