Actually tested a bit and it seems like anything forcing a stat recalculation will make the ceneril buff go away, for instance if i equip my ceneril then use briar shield i loose the ceneril stats. This bug pretty much makes the cenerils unusable in runs since there is no way you can go around without using a single buff ever.
Tankyhealy P/K 98/98
Soppy W98/WD98/S98/D98/R98/M98
vids and stuff: https://www.youtube.com/channel/UCFh1qLzUKyyZHadIxExA_kw
Borella should loot every boss