Assertion failed when entering HTML-like & into csproj

[ThreeSevenths]

Hello, I came across a bug while entering in an & into a copyright today. After entering the ampersand, the editor throws an assertion failed error. It seems to be possible to continue editing after that point.

Video of the error in question when editing a blank Console App project.

[Nerketur]

This happens to me too. Also gives error when typing & into an attribute like Condition

[Frulfump]

This happens to me too. Also gives error when typing & into an attribute like Condition

Hope you will get some help but the repo looks abandoned unfortunately.