From these 3, I would connect only the last one (infamous battery issues, which made this thread at least 10 pages longer ) to kernel, other 2 may be related to CSSU (just my guess). As someone else suggested, try using different profile than lv (or ulv or xlv, just "ideal" maybe?) as base and check if it happens still. If not - well, maybe your device is not meant to run at low voltages. (They are not meant to work on all devices AFAIK, just like overclocking to 1Ghz)