When I turn up or turn down the volume,the volume bar won't disappear immediately until I touch the screen, and this problem is so annoying when I watch the vedios.hope someone can help me to solve this problem.
It seems to be an annoyance, if it was me personally, I'd backup using Xperia Companion and then do a full software repair using Xperia Companion to proper clean it out.
If it still does the same, contact your Local support# for an evaluation
