[2.0.36] Modded agricultural tower doesn't prioritize fuel over seeds

[cackling.fiend]

https://mods.factorio.com/mod/lignumis adds a "Burner agricultural tower". It's not easy consistently fueling it without a dedicated belt/chest for fuel because inserters won't prioritize fuel over seeds. They will even pick up another seed when the input slot is already full and fuel is empty.

The only case where it seems to work is the third screenshot. The fuel needs to be on the left hand side of the belt in order to be prioritized over the seeds (ignore the seed in the inserter's hand in this screenshot because the tower is fueled already).

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[Rseding91]

Thanks for the report however this is not a bug. Inserters have no priority system with what they will grab when putting into a given thing. It's up to you the player to handle this with dedicated fuel inserters.

[HEROgoldmw]

I'd like to add to this that is it most definitely a inconsistency, if not a bug...

Lets take furnaces for example, exact same thing. A building, with a fuel slot and input/output slots.
However, furnaces NEVER have the issue mentioned in this post. Never have I had a seen a inserter put in ore, while the furnace is low on fuel.
Either way, this post is (annoyingly/frustratingly) inconstant behavior compared to a furnace.

A change would really help this situation

(I encountered this while playing with the modded tower)

[Rseding91]

Furnances stop accepting input items before the input inventory is 100% full. Because of this, they will be told "no" to more input items at some point and then "yes" to fuel if more fuel can be added. Agricultural towers do not stop accepting input items until the input inventory is 100% full and so an inserter may get stuck holding an item over the tower without being able to insert it.

You can observe the same behavior by having many inserters with high inserter stack sizes putting into a single furnace - one or more of them may get stuck holding something it can't yet put into the furnace.

[cackling.fiend]

Is that something that can be modded or is it internal furnace logic?