Ive had this happen also.....I had it happen with chrome/email but stock broweser/email worked fine and calculator/calendar didnt work either.
Sent from my SPH-L900 using Tapatalk 2
Im using 2 right now not sure what is wrong on your end
Sent from my SPH-L900 using Xparent Green Tapatalk 2
with version 1.2 I could use any app(I think lol) I cant remember cause I didn't use it much. but now that I want to use it Its not working errrr....all the apps come on when I hold the back button but when I try to use two, it doesn't let me.