I have a smart home skill that uses incrementPercent/decrementPercentage.
In the past I could say "Raise device" and the device would raise 25%. Now raise no longer works. Alexa does not give an error, just a short "dong" sound.
I can successfully say "Brighten device".
One strange thing is that this only happens with newly discovered devices in the past couple days. My device that was discovered last week still responds to raise/lower.