This definitely used to work as expected (press to be ‘holding down’ the virtual ctrl key) but has stopped for me. It still goes blue, but letters are typed into the console normally, eg in vim if I tap ctrl then tap v it should say VISUAL BLOCK in the info line but it just says VISUAL. Same in bash: ctrl then l should clear the screeen but it just types l.
Esc, tab, cursor keys all work, only ctrl is broken.
iOS 11.2.6 on iPad mini 2 Tested with Chrome and Safari.