The rotate icon dissapears on mine often too, usually a soft reset fixes it but i dont use it too often because i find it to be buggy.
Try mapping a button to the rotate function.
The bubble problem is common too, sometimes it decides to stay at the top when it is suposed to disapear, ive even seen it display ?????????? when you click on it.
End of the day i think there just OS bugs, nothing much to cure it atm
Asus TF Prime - C20KAS - Androwook HB 2.31
Samsung Galaxy S4
Samsung Galaxy Note 2 (Work Brick)
Samsung Galaxy S2