Problems with DMG installer on Sonoma

I have created an "installer" style DMG for a VST3 audio plugin. It works fine on 13.4, but fails on 14.1.

Note this is when I download the DMG from GitHub.

On 14.1, when I drag the plugin icon to the link to /Library/Audio/Plug-Ins/VST3, the icon snaps back and the copy is not made.

It DOES work if I use xattr to remove the quarantine.

I can also mount the dmg, cd into the volume and use cp -R to copy the bundle through the link.

Random other facts :

• The dmg is built on a GitHub runner (MacOS 12.6.9) using Xcode 14.2
• The plug in and the dmg are signed.
• The dmg is notarized and stapled.

Any help would be greatly appreciated! Thanks!