Fiddles+Kalista possible bug?

I was just playing an ARAM. Enemy team had Kalista bonded with Fiddlesticks. The first time, I was like.. Oh, cool... then it got dumb. Fiddlesticks became, not "untargetable" but still untargetable, as soon as his ult teleport finished, as she was pulling him in. Okay, cool, saved your bond. We immediately kill Kalista. Fiddlesticks pops back out makes impact with nothing, but I cannot target him still for a second. He fears me. I (am pantheon by the way) w>q>e him and he takes no damage. I die. Would need to test this to see if it can be reproduced, but he became untargetable 3 times without using his hourglass just because of Kalista's ultimate (and it didn't even bring up the "untargetable" popup text).