Send to voicemail missing

I just played around with this, but I am an admin with power pack and can't think of a way to easily test this in my environment for you..  I did find an issue of sorts though.  I noticed that even when transferring to a contact's external number (non Zoom) like landline, mobile, etc. it still has the transfer to voicemail icon, but obviously doesn't and can't work for non Zoom numbers.

I am having the same issue as well. When using the Zoom Assistant widget I did see the option for transfer to voicemail, but now it does not appear. Also, like @BrandonS says, on external contacts I did see the option to transfer to voicemail which shouldn't be.

We are having the same issue, was able to test trying to send to voicemail to the same internal user.  Option was there for one person but not another.  Is there a fix for this?

Solved the mystery...  This happens when the user has phone control enable.  For whatever when call control is enable for a desk phone the option to transfer to voicemail from the zoom assistant / widget is no longer available.   If you disable/disconnect call control the option shows back up.