This mechanic could complicate pulling the hunter/forager cycle in TT when they spawned a long ways from your camp.

Keeping them close would definitely help, but it seemed like time was a factor as well. A mob that gave up pursuit also seemed to not just stop chasing, but warp back to a [random?] point on their patrol path.

I'm not certain if time was a factor or not. On my druid I'd often kite named mobs with way more HP than I could easily handle, or else I'd engage at 20% mana and med kite for 20-30 minutes to ensure I got the kill. The only thing that seemed to make them stop persuing was getting too far away.

Add the second part and I can almost guarantee the first will start happening.

My "time factor" impression may have arisen from classic-era packetloss and latency. Even when I thought I was doing a good job teasing the frog back to camp, the server and my client did not really agree where we were in the world. Once re-sync'ed, the frog seemed to "warp" back to his patrol path.