I have noticed that the new leaf growth have twisted leaves at the tops,i have seen before and think its sometimes genetic as it disappears quicly,however this doesnt not seem to be getting any better.
I have cut down on watering a little and increased light to 60%. Temps have also gone up because of it being summertime at just over 85F so there will be a little heat stress going on.
Im adding Bio heaven to water at 1ml litre to help.