Wtf, dev fee has been mining for 2 hours and wouldn't stop at all most likely. I went to 8.6% of dev fee already, while you usually that kind of % only after 1st dev fee session in the beginning simply because total miner run time is minimal. Than its just from 1.9% to 2.1% dev fee even after running miner for a week+ without crashes, at least it used to be. Just restarted miner as soon as I noticed it.

ps same shit just happened on my other rig, dev fee started and kept going on to 3.7% after 1 day and 7 hours until I stopped the miner.
who cares this miner has been consistently 5% over 24hrs reported hashrate at the pool for me.