Following today's changes to the ARR system, it is now wholly broken for me.
If I select the option to update visible ARRs, the entire list of ARRs are unable to be clicked on, displaying the 🚫 emoji on hover.
If I unselect that option, I can click on the ARRs and they do dispatch, but the 'load missing vehicles' button no longer adds the additionally loaded vehicles to availability for ARRs, meaning they are always locked to the first set of nearby vehicles.
I play via the Firefox browser on PC.
Edit: the unclickable ARR issue seems to have resolved itself overnight.