CTRL - C/V not working in contenteditable div

I have issues with copying and pasting content from and into a div with contenteditable set to true. Like in this editor I can't use CTRL-C -> CTRL-V, while copying from or pasting to another element or program works just fine.

To reproduce:

• Select text somewhere in the editor
• Press CTRL-C
• Click somewhere in the same editor
• Press CTRL-V
• Notice that nothing is happening

• Select text somewhere in the editor
• Press CTRL-C
• Click on the browsers address bar
• Press CTRL-V
• Notice that you just copy-paste the text

• Select text from the browsers address bar
• Press CTRL-C
• Click somewhere in the editor
• Press CTRL-V
• Notice that you just copy-paste the text

Microsoft Edge 44.17763.1.0
Microsoft EdgeHTML 18.17763
Windows 10 Pro 1809