I installed Ubuntu 18.04 and reproduced the problem. Until seeing your post, I thought it was a gnome-terminal problem, because it does not occur for me with xterm, though I didn't try hard. xterm tends to be the least buggy emulator IME, perhaps because it has a rigorous test environment.
A workaround is to start the gui early, by putting a "gui" command in .vimrc. Back in 2018 there were a few folks using similar workarounds. Regards, John Little -- -- You received this message from the "vim_dev" maillist. Do not top-post! Type your reply below the text you are replying to. For more information, visit http://www.vim.org/maillist.php --- You received this message because you are subscribed to the Google Groups "vim_dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to vim_dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/vim_dev/2e6fa593-bd6a-48e4-91a5-1254bf2a42b3n%40googlegroups.com.
