just got oneplus x flahsed to cm 13 nighly mobile data stops working after reboot

phone works great then reboot no mobile data have to keep turning data off and on and refreshing network I get a LTE! symbol. The signal goose up and down very fast. Is this a bug in the rom, Or a bad APN setting? after like 15-20 mins I get it working. I really want to run cm13 or android 6 whats a good stable rom or should I just flash back to factory?
Thanks

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