I had this issue trying to bot lobsters at corsair cove. Using EpicBot (free download) I was able to find out that the fishing spots were actually NPC's - Used that node and the bot runs perfectly. I'd give that a shot as well as looking into EpicBot as a tool for figuring out entity...
Turn off the loot window in rs settings. This fixed looting for me.
On a side note. Anyone know how to get bury bones to work? Is the bot not burying because they are selected for looting? If I don't the bot doesn't pick them up at all soooooo.