I'm experiencing the same thing on Ubuntu Xenial. I initially thought it was only on using Alt+left/right, but did a Alt+F4 to close a window just now, and the window did close but it switched to VT4 as well. I think it started happening today on my system.
Linux 4.4.0-116-generic #140-Ubuntu SMP Mon Feb 12 21:23:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1710637 Title: Input falls through to gdm3 and terminates the session on Ctrl+C after udevadm trigger is executed under wayland To manage notifications about this bug go to: https://bugs.launchpad.net/snappy/+bug/1710637/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs