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Yes, I've had this happen before when using the Safari tab overview feature. Seems to be a software bug that occurs when a lot of tabs are open. The tab overview is also sluggish in general with a lot of tabs open. I'd suggest reporting it to Apple.
 
Yes, I've had this happen before when using the Safari tab overview feature. Seems to be a software bug that occurs when a lot of tabs are open. The tab overview is also sluggish in general with a lot of tabs open. I'd suggest reporting it to Apple.
Thanks. Already reported, hope Apple gonna fix it soon
 
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