Yesterday I loosened the LST ties on my plants (which are about 4" tall) to give them a a couple days of relief. This morning I checked on them and something strange has happened. One of my planted was completely seperated at the base just above soil level. I have no idea what happened. Its not a clen cut or anything. Only thing I can think of is that the fan caused it to rub against the string that was tied around it's base. But the tie was loose. Is there any pest that would do this? I'm baffled.