Sequoia bug. Dragging photos into Messages is pasting into the wrong conversation.

I've been doing this for YEARS without problem. I keep messages open on the side, just enough where I can see the contact bubble for each conversation. I typically will drag photos or screenshots from Safari into Messages (while Messages is still technically in the background), then the image will paste into the correct conversation with 100% accuracy. For some reason with Sequoia, it fails 100% of the time. Now I need to actually have Messages in the foreground and to be on the correct conversation to paste it in correctly. This is a minor bug, but it's definitely annoying. I'm so used to it working that I instantly press enter to send the message without even double checking if it's the right conversation. Now I'm sending the wrong people the wrong images and I have to tell them "ooops that wasn't for you"