TWRP reboot when backup

My note 1 got reboot whenever I performed backup. I searched around and managed to follow the procedures mentioned in other thread, wipe the cache and fix the rights, but no help at all. I did even try to reflash the raw kernel r4 again, but not working. It was working well before. Any help?

I am using omnirom 1224 with pa gapps 1215, asym kernal 1219.

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