The interaction of quick farm talisman with chemical harvesting is not useful in my opinion.
There are three ways you can harvest chemical barrels:
1. World chemical nodes; harvesting from naturally spawning chemical pipes.
2. King; using king's spawner to spawn chemical pipes.
3. Chemical tokens; using chemical tokens to spawn chemical pipes.
For king's spawner and chemical tokens, using a quick farm talisman is not even that useful in general. Since you should be doing this in a secure base, you can just leave harvested chemical barrels on the ground until you are done harvesting chemicals, to which you can just pick them all up in one sweep.
So let's focus on world chemical nodes instead, since quick farm only inventories chemical barrels that finish harvesting near you, this means you have to be next to the chemical pipe when it finishes harvesting. But when you are harvesting world chemical nodes, it's more efficient to harvest from multiple pipes at once, which means you will be flying from pipe to pipe, where it is unlikely that you are next to the chemical pipe when it finishes harvesting.
I suggest that it be changed from instead of having to be near the chemical pipe when it finished harvesting, it should auto-inventory all chemical barrels you placed yourself on chemical pipes. This doesn't make a difference for the last two, but for world chemical nodes it allows the talisman to have an effect.