When you get a quality agricultural roboport with roboport range increase active, it gives the increased range, but seems to break the planting ability of the agricultural roboport.

It becomes named 'Unkown key: "entity-name.agricultrual-roboport" (name) (quality level) when placed, and seems to be unable to plant.

Scaling the range of agricultural roboports would have to be implemented on their end, since all functionality of that mod depends on control scripts.
The "not working at all" issue is easier to fix - ideally the Agricultural Roboport mod would blacklist the entity on their side*, but I can also add it to the default blacklist in the next release from my side.

*how to do that:
add the following to either data.lua or data-updates.lua:

if (not data.raw["mod-data"]) or (not data.raw["mod-data"]["clone-blacklist"]) then
    data:extend({{type="mod-data", name="clone-blacklist", data={}}})
end
data.raw["mod-data"]["clone-blacklist"].data["agricultural-roboport"]=true

That would be awesome! Helps out when I have someone who loves to get everything to highest quality we can then panics because something stopped working. Took them a while to realize we have this mod installed, and now they never want to give it up.

Should be fixed in 1.5.5.