Send to Illustrator as vector from Project Neo just download the AI installer dmg on ARC Browser

Hi there, 

There seems to be a bug in the "send to Illustrator" feature using Arc broswer (which is chromium based and compatible), if I try to send to AI I end up dowloading the AI installer .dmg file and a message prompting to install AI to start. On Chrome it works. Could it be a bug or maybe some browser setting? 

Thanks for any help.

L