I am happy to share that we have fixed this bug in our latest release – 26.3.1 which is available worldwide now.
Going forward, our goal is to fix as many top User-Voice bugs as possible and as frequently as possible. Given the nature of the fixes, some of the bugs will take a longer time to fix, but we are on it.
You can update to the latest release using Creative Cloud desktop App: https://helpx.adobe.com/in/creative-cloud/help/creative-cloud-updates.html
Thank you for all the feedback. Keep it coming!
An error occurred while saving the commentScott R commented
Shift+drag continues to be erratic here. Enabling/disabling Transform Tools does not appear to be a reliable fix. Same shift+drag issue seems to be plaguing Photoshop as well.
Illustrator 25.3.1, Big Sur 11.5
Edit: May be worth noting that the erratic behavior consistently manifests itself during option+drag copy actions