A recent fix in CirrusSearch caused the cirrusSearchLinksUpdate jobs to be routed to the prio/non-prio topics correctly.
Prior to https://gerrit.wikimedia.org/r/c/mediawiki/extensions/CirrusSearch/+/535869 all jobs were routed to the prioritized topic cirrusSearchLinksUpdate.
Now the cirrusSearchLinksUpdatePrioritized should only be populated for "root" LinksUpdate jobs. Other changes due to template propagation should be scheduled to the cirrusSearchLinksUpdate, the effect is visible on the number of received messages on both of these topics.
We should perhaps re-adjust the concurrency configuration of these topics in changeprop.