It seems to work differently now. v0.2.1 has a copy button that spans the width of the block (sometimes wider) and in 3 out of 4 themes I tried it on (Cybertron, Reverie and Minimal) it overlayed Line 1 of the block as seen below. California Coast did not overlay line 1 but the Copy button was wider than the block so it looked a little weird. Its generous to post a community plugin but having issues disabled is a little bit rude.
Same issue here with the new version & using California Coast theme.
For the moment i encapsulate data i want copy of in a custom admonition block which works well for formatting the ‘Copy’ layer: