@olivierlambert
I did post an alternative script here:
https://xcp-ng.org/forum/topic/8620/usb-passthrough-override-script-to-ensure-usb-policy-conf-consistency
But it was later removed due to request by @stormi .
I'm currently using my script which basically backs up your settings and overrides the default one (after backing it up on first install) on every boot. I know its a crude way to handle but it was only meant to be temporary till you guys find a solution.
I have reposted it.
Not until we can have our own piece of code doing it. Right now, it's a binary that's not Open Source made by Citrix, we cannot legally re-distribute it.