I haven't tried using SegWit with Bitcore yet, other than enabling the setting on my pool as I know the coin supports it. However I find it really strange that my pool has generated one SegWit block among many normal blocks, without changing any settings. Take a look at
http://psychedelic.fi/site/mining, block 118382. Can anyone guess why that single block happened to be a SegWit block?
Actually I was wondering as well, but don't have answer, sorry. Will be interesting to know (similar can be found in other pools as well, but haven't found any logic in those neither...)