Keyboard mapping issue(s)
Gnome host: F28 with spanish (Win keys) keyboard setting. F28 is using English US idioma, just different keyboard. VNC client: Win 10 Pro w/ US english keyboard / US english system idioma.
Key mapping seem to be a bit off - US keyboard give "1/8" character when typing "@" (shift+2), other keys are similarly re-mapped. Both keyboards map as expected on their respective hosts, only VNC displays re-mapping.