Why does "Search is waiting for input" has a delay if using loadjob and JS?

Main search: `makeresults | append [| loadjob "$exchange$"] | eval trigger="$submit_trigger1$"` where the ad-hoc loadjob sets `$exchange$` via $job.sid$ However, the "search is waiting for input" message does not go away until `$job.sid$` is populated. Changing `` to `` does not fix the issue. Isn't this an inherent drawback to using `loadjob` as a replacement for post-processing with its many faults (unable to do multiple base searches, export button grayed out)? Are there any workarounds or fixes?