The typing sequence "[shift][[shift-up]" isn't handled properly

[fresheneesz]

It seems that the keys syn tries to type from "[shift][[shift-up]" are "shift" then "[shift-up". Since "[shift-up" isn't anything, you get an invalid event. Does syn have a way of escaping the "[" key? Syn should be able to figure out that since "[[shift-up]" isn't a correct sequence, that the first character of it should be handled by itself.

In chrome.