Dude I'm really not sure what the hell happened with my last plant. I know I fucked up and didnt adjust the pH at all after changing out the rez, so probably it was unable to absorb much nutes for 24hrs or so, but I fixed that and she still just went downhill fast. It was defintely weird, just stopped drinking water completely and got all droopy... then died.
Well lets hope you don't see any weird shit going on with your other plants. That AG was so packed anyway that I'm sure your remaining ladies will like getting the extra light.