Since using SketchUp 2025, I’ve suddenly noticed that the Alt key and the Ctrl key don’t always work properly. For example, when I want to use the eyedropper with the ‘paint bucket’ tool, I used to do that with the Alt key, but now it doesn’t work correctly. I have to first use the orbit tool, and then it works again. I also have this issue with ‘undo’ — when I press Ctrl+Z, SketchUp often doesn’t respond. Is anyone else experiencing this? Is there anything I can do about it?
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Yep, very irritating, and I extremely surprised you are the 1st reporting it.
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It doesn’t always happen. Often, everything is fine at first, but after a while, I suddenly have this problem. Really very strange and indeed quite annoying.
Multiple su sessions might trigger it, but it’s not for sure
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Will try that right now! 
(I most of the time have more sessions running)
I have the exact same issues. Did you find any solutions?
I have the same issue and it’s extremely irritating, and a big time waster. @sketchUp-developers any update on this?
Occasionally there are problems with Alt and Eyedropper: Eyedropper remains (got stuck) - no matter how many times you click Alt (the workaround is to press Paint shortcut again); or, it’s impossible to activate Eyedropper - some orbiting needed.
I have the same problem here, very annoying.
My workflow isn’t as efficient because of all the extra clicks… Ctrl+Z doesn’t work properly, the pipet and bucket tool don’t work properly, …
Please come with an update to fix these problems.