"Empty" Gas Canister or Liquid Bottle priority can only be set from "Sweep"

I cannot reproduce in the exact same way OP mentions, when I set the priority when the sweeping errand is active, it only seems to affect the sweeping errand.

There does not seem to be a way to set priority for the empty errand, through the object or priority dialog.

On 1/5/2020 at 6:38 PM, fooperton said:

I cannot reproduce in the exact same way OP mentions, when I set the priority when the sweeping errand is active, it only seems to affect the sweeping errand.

There does not seem to be a way to set priority for the empty errand, through the object or priority dialog.

You are clicking empty first, then sweep, then changing the priority - this does not affect the empty task.

You need to click sweep, then change the priority, then empty, then cancel sweep - this will apply the new (higher) priority to the empty.