I expect we'll get logspam from ProofreadPage on wikisource wikis caused by the deprecation of dynamic property access (https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1004257).
This is patched in master at https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1020249 and https://gerrit.wikimedia.org/r/c/mediawiki/extensions/ProofreadPage/+/1020250 -- both patches are necessary because ProofreadPage does an unset on the property, so without 1020250 the declared property will become dynamic again after the unset and start emitting deprecation warnings again.
I will prepare backport patches for 1.43-wmf.1 for these, but I may have intermittent connectivity over the next few days (presenting at MWUD 2024 conference) so I wanted to make sure there was a task and explanation here to empower SREs to handle the backports (and any similar log spam that may arise) in my absence.