At times leaving shift pressed and pressing a sequence of keys only capitalizes the first letter

[quesada]

This is solved by reloading EPKL. Using AHK 1.4 (not 2.0).
Any idea why this happens?

[DreymaR]

I can't remember seeing that particular problem, no.

I would not compile EPKL with any other AHK version than the one provided with the repo (currently 1.1.27 which is old but at least tested – moving on has proved difficult due to changes in the handling of the RAlt/AltGr key).

In the long run I have ambitions of moving to AHK v2, but that won't happen very soon I'm afraid.

Also, please provide some more info as to what your OS/Windows underlying system layout is, what EPKL layout you're using and whether you may have any other key hooking scripts running (not recommended). I do suppose you're using an updated EPKL (latest release version or newer).