If I'm in PiP mode (with one channel displaying full screen and other in a PiP window) then when I press [BLUE] I should see a menu with PiP options such as 'disable PiP', 'Swap PiP services', 'Move PiP window' and 'Change Zap focus to PiP' (may not be exactly correct names), and this normally works.
However if I press [EPG] to go into the EPG and the [EXIT] it removes that menu so that even though PiP is still active the only PiP related function available when I press [BLUE] is 'Enable PiP'.
This is wrong.
It's as if the menu system has forgotten that PiP is enabled but actually it is still enabled and working.