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Scrolling in the Slices tab can cause Designer to freeze (and slices sometimes appear incorrect)

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I have about 90-80 slices in my project (It's and Android app) , and each slice is exported to a number of files (PNG and SVG).
When using my mouse wheel scrolling up and down, folding and unfolding my slice to check that the export looks ok Designer freezes.

1. I first created a "master" export setup manually, exporting one SVG file and a number of PNG files in various resolutions to target all DPI:s

2. I used the "copy export format setup to clipboard"

3. I marked all my other slices (except the top one)

4. I used the "Add export format setup from clipboard", so all my slices is exported in the same manner (keeping the slice name unique)

5. Using mouse wheel in the Slices area up and down 

6. Unfolded a few of the slices and rolled the mouse wheel up and down fairly quickly

7. Designer freezes, boom. It recovered my file when I restarted though (phew)


I also created a crash dump file of the Designer process was frozen and ran it through DebugDiag Crash Analyzer,
the report is attached. I suppose I could send my file to the developers if that helps reproducing the freeze, but I rather not post it on the forum




Video capture
Sometimes the slices are not redrawn properly in the UI, not sure how to recreate this - but here's what it looks like:
Video clip with the error




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Hi Magnux,

Thanks very much for the video and screenshots. If you could send us the file that will help us immensely as it does sound like a very intricate and complicated document. I understand not wanting to post it publicly so I've created a link to upload it to our Internal Dropbox account - if you could do that it will help us investigate and reproduce the issue!


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I uploaded my .affinity file, and also the crash dumpfile I created (7zip compressed).

I also attached a debugger (Visual Studio 2019) to the Designer.exe process, to see if I could see something interesting happened when running the mouse wheel to provoke the freeze,
and I noticed that the GC was running quite intense just before the Designer UI stopped responding. After this I paused the execution and created the dump file I uploaded to the Dropbox. 

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