Thank you for posting a video. This is the best possible bug report .
The path finding is setup so they choose random trees that are in range of 50000. This causes them to go far in some cases like yours.
In the past we have had lumberjacks all clump up onto one tree. This causes them to not be able to gather resources which is worse then it currently is now.
Realm of Rulers is very early in development which means we are always improving these systems. I would like in the future to have the lumberjacks gather the closest tree without too many people gathering it at once. This might be for another update. A rework of the whole AI system might take a while but it will be possible.
The trees that are really tall currently cannot be gathered by the AI because they are a different type of object in the game. They are a foliage index which means the lumberjacks cannot path to them as they don't know they are there.
We are designing a new system so that all AI will be able to path to all trees, rocks and plants regardless of object type but that is currently later in the schedule.
We are glad that you are enjoying what we have to show so far . Realm of Rulers is made currently by only two people so we try our hardest to improve the game and make it enjoyable for all.
140k Views! 20/02/2018
Over 100k views! 21/06/2017
When the newest Realm of Rulers update comes out...
Yeah, I'd love it if they went for very close resource nodes. Maybe you can develop some type of system where individual tree entities get temporarily "claimed" by a worker. The workers would then attempt to claim the nearest tree to the storage shed that isn't already claimed. Each time they return objects to a storage shed they could re-calculate if there are any more efficient nodes available to claim. In any case picking a forest that isn't a light year away would be nice.
I'm thinking Starcraft style which is one worker per node at any given time, as opposed to Age of Empires style which is as many workers as can fit on a node at any given time (which as you said has caused problems in the past).