Mkay, just tested this again. If I have the plugin enabled, the navigation in the bot will slow down a lot.
Every step he takes (read: click-to-move), he pauses for like half a second.
From the logs, I'm guessing it's because of the loot tracker. Any way to have it check for loots just when the bot is actually looting? Not every X seconds.
I've been out of town for a week so I haven't tested since then, but I can confirm that I had the exact same issue. Massive delay between navigation clicks and slow to react in combat. Removing the plugin and restarting HB would remove the slow down. This would happen even without connection from the browser.