This issue likely is not a bug in the Discourse code
But I am documenting it here, as many people should be seeing it and could get a little bit confused. Perhaps Discourse teams has better reporting channels to Google or Chromium.
Currently the situation is that copy-pasting http:// links to a post is broken on up-to-date Android devices running Google Chrome or other Chromium based browser. I have not been able to identify whether the issue is in the browser or the could it be the GBoard keyboard.
Simple steps to repro:
Copy a link
Try to paste it to a post
→ Nothing happens
But if you copy the URL field content as text, it does work:
Copy the link
Paste it to Chrome URL field
Select all text & copy
→ You can paste the link to Discourse message composer
Here are some user comments and screenshots. We started the topic in english, but eventually it drifted to our native language.