R9 380X and UBQ, strange behaviour

Hi community

I am trying mining UBIQ on a R9 380X rig.
Some time spent tuning this correctly, I noticed a very strange behaviour of lolminer : a DAG is regenerated very oftenly (~1h). Is it normal ?

This impact badly the global hashrate with regular and sensible drops

Ethminer doesn’t seem to do this, but has a very high rate of stale/invalid
It looks like it has dificulties to connect to Crazypool