[PROBLEM] Random on-screen controls in video playback

[petebulley]

I do apologise if this has been raised before, I'm not able to find a solution searching on the forum on Google.

Software
XBian version: 1.0Beta2
XBMC version: 12.2
Overclock settings:

Hardware
Power supply rating: ?
RPi model (model A/B 256mb/512mb): B+ 512mb
SD card size and make/type: 16GB
Network (wireless or LAN): LAN
Connected devices (TV, USB, network storage, etc.): TV (HDMI), External Harddrive (where all media is stored). Control XBMC via iPhone app.

Logile
Link to logfile(s): not sure which log to add?

Problem description:
My Xbian setup is working without issue, except that during playback of video (TV Shows) the on-screen controls (time bar, play, pause etc.) will randomly show for a couple of minutes and then disappear. This can happen many times, or only once, or not at all, it can happen at any point, it seems to be completely random.

How to reproduce:
Random during playback