Hm. It looks like train loading works under the following conditions:
A train has arrived at a station (this generates an on_train_changed_state event that the loaders look for to start loading/unloading)
A cargo wagon has been built in their vicinity (this generates an on_built event that loaders look for)
A loader has been built next to a cargo wagon (this generats an on_built event that scans for nearby cargo wagons)
But it doesn't look like it works with construction robots, and I recall there being a change where on_built for construction robots was separated out. I will work on figuring this out, in the short term re-dock your trains. :D
Unfortunately the issue still exists...none of the loaders will load or unload trains...I have a different loader mod as well, and that no longer loads or unloads trains either...so Im not sure if its the mods or somehow my game file got corrupted...
Yes I do have loader redux installed as well....saw the enable/disable thing this morning and tried that...apparently it automatically reset itself back to disabled no matter what the setting was...give me a day or two and ill send you a copy of my save & the mod list...
Well, apparently, after uninstalling, and reinstalling, your mod (tyvm for all the help btw, I very much appreciate it), loader redux, and then using some holy oils and saying some prayer over the computer, and the standard fix for everything called a "reboot" everything is working perfectly now...