Just purchased a battery grip for my T2i on Thursday. I started noticing that after long periods of being powered down, the camera won't turn on unless I pull the battery cartridges out and put them back in. Another issue seems to be an issue a previous grip (BG-E2) had where the camera would turn off unexpectedly. In my case, using the dial to change settings powered down the camera. Has anyone else noticed this issue or do I just have a faulty grip?