Created attachment 169706 [details]
exact thing I pasted into the document

This bug was filed from the crash reporting server and is br-c1954b51-e42f-44d7-a39a-9d16d9cefa2a.
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1. had just set default file load/save to 0ffice 2007-365
2. Closed and reopened named document.
3. Typed 3 words on 3 different lined double spaced
4. copied the highlighted results of my google search - both definitions
5. pasted in between 1st and second. There were a lot of unexpected frames
6. I decided to backspace, but soon discovered there was a LOT to delete AND that I had accidentally deleted part of the beginning of the second defintion.
7. I then decided to just use CTRL Z to get me back to the original paste. I HELD the CTRL and tapped the Z multiple times quickly.
8. That's when it crashed.

NOTES: 
1. I know I should have just deleted the whole thing with a quick highlight/delete.
2.I was able to replicate it every time.
3. I did not try to reset my profile
4. I tried for a long time to determine if opengl was enabled or not. My lenovo is a thinkpad t470 w10dg signature edition with windows update installed 9/9/20 and verified today that it is the latest version. Google tells me it is likely installed in windows 10, but I can't find it using a programs/app search. I don't like to download apps that I don't understand the purpose of.
5. This is a minor thing. I don't really care if it's fixed, but I thought you should know about it.  I will also update to the latest non-beta version of Libre and see if I can replicate it.