It just freezes for a second when dragging or entering a group of layers. It is so annoying and frustrating, and when I try to enter a group for instance, it makes a selection of layer/group of layers and drags it to the direction of cursor.
Sorry to hear about your experience. Would you mind trying the suggestions in this help article (https://adobe.ly/3VgXWW6) and letting us know if they help? If the problem persists, kindly share more details, like the exact version of the OS/Illustrator, whether Illustrator behaves this way with all files, and a screen recording of the problem (https://adobe.ly/3VkHyDS), so we can investigate this further.