Yeah all strains will have different feed patterns. I've never grown AK, but boy I sure would like to.

The plant may drink less from being in a less heated area of the grow, humidity, O2 in the bubbler, the plant may be smaller could be a lot of things.

You may want to increase the EC next time you change the bubblers. I wouldn't continue flushing that plant, go ahead and start feeding it again. As far as the ec dropping and ph dropping, the plant probably took up elements that were locked out from the salt build-up. Once you change the bubblers again then the ec and ph fluctuations should slow down. There will still be daily changes in readings but they shouldn't keep wildly going up and down. It takes a little bit of time for the plants to settle back down.