Help black rectangular 'glitch' on screen?

[darthvader_22uk]

Hi all

on a couple off occasions now Ive had a small black 'glitch' type thing appear on my screen it stays when opening any apps however a reboot tends to get rid of it? Is it something I should concerned about? Does any one know a solution to stop it happening again?

thanks in advance guys and gals

 

[Mr. Lucky]

Never seen that on my wife's or my S4. Are you using an alternate launcher? If so, try different settings… in particular, toggling "keep in memory" (if such an option is available).

 

[darthvader_22uk]

Hi thanks for the response, im using the normal system set up I think, its pretty random and just appeared as if an area of the screen died. do you know where I would find this keep in memory?