Countdown tile not destroyed.

 I was playing a node in Venom Bomb and downed a symbiote with a match 3. When the tiles dropped they made a match 4 that cleared a row. However, the row contained a countdown tile that belonged to the downed symbiote. When the row was destroyed the countdown tile was left alone in the empty row. The countdown was removed and then the tiles dropped from above around the basic tile that was left after the number was removed from it. I don’t know whether I was credited with the AP for the tile or not. The countdown was NOT fortified.