Reproduced on 353eeeaca269ed5e83900bd4a24dc6dc80bb4880.
When editing the following file:

case Arg is 
	when Name_Async,
	when Name_Num_Gangs,
end if;

with the Ada filetype activated, the following steps:
ggjVj<C-v>$o$A<Backspace><Esc>
(with <C-v> being Ctrl+v) will insert case Arg is at the end of line 3. I don't understand why and think it might be a bug (but I've been wrong about this kind of thing before so please let me know if this is the expected behavior :)).