System :
Windows 10 Pro 64bit
c2 64bit
Windows 7 Ultimate (Macbook Pro) c2 64bit
c2 R269
Gif showing the bug : imgur.com/a/5tlnrdf
Comment :
This happens quicker and sometimes it takes ages as it seems to scroll through every sprite in the project
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I'm afraid we're unable to help unless you follow the bug report requirements. Closing.