psp keyboard delete button not working

[erwincloude]

Hi, for some reason the delete button( O ) and on some versions even the ( X ) button on psp keyboard(when creating names for characters, teams...) doesn't work for me anymore. I tried using my keyboard and a controller on multiple games(Valkyria Chronicles 2, Phantasy Star Portable...) but both dont't work. I only noticed this after using ppsspp windows 64 0.8 version and further. I don't remember on what version exactly it worked before but now it doesn't. So I'd like to know if this is happening to somebody else and what to do to fix this?