The picker dollies mod allow moving entities square by square without picking them up.
When it moves a miniloader (or chute) it doesn't update it and breaks it.

All belts, splitters, undergrounds (and the K2 loaders) are blacklisted and can't be moved by picker dollies.
I think you should add the miniloaders to that list so players don't mess their builds.

As shown on the mod page (https://mods.factorio.com/mod/PickerDollies), it provides an API for this :
if remote.interfaces["PickerDollies"] and remote.interfaces["PickerDollies"]["add_blacklist_name"] then
remote.call("PickerDollies", "add_blacklist_name", "name-of-your-entity")
end

Thanks :)