Ya i have a same issue here, not sure is player harvest my plant or player abuse bug to steal your plant
Try not to hide your weeds, i planted it where most of the people planted theirs.
Just set my cellphone alarm clock 2 mins early so that I can get back to it asap.
I heard channels can crash specially those w/out people on (not sure on this)
but my weed has never disappeared or stolen.
my case i dint hide , and is not about steal , just the time are wrong… not even one hour is disappear , and i hv screenshot it after i plant