This issue is still present in 27.7, but I have a lead to where the bug is located. For me, the problem only occurs when the transparency panel is located on the second monitor. As soon as I drag that one back to the main display, there is no delay to selecting objects. The position of other panels had no influence. My situation: It takes 1-2 seconds to draw a bouding box after selecting an object. I'm on Mac Studio M2 Ultra with 128Gb ram, 2 monitors, no other apps running, GPU acceleration on. This is a fresh install, not a migration.
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