BIP 91 is locked now. Plz, be careful on Bitcoin transactions. There is a little chance to get your tx rejected which is included a block that is not signalling BIP 141. Currently over 97% miners shows supports for BIP 141. But still some unknown and little miners such as Canone (acquired 0.5% total hashrate) are not signalling to BIP 141. All blocks produced by these miners must be rejected. If you found your tx rejected then you can re-broadcast after 72 hours (when the most of the nodes and mem pool drop it). Thank you :)