Hi, it seems that the issue exists also for double quotation marks, " (again, combined with Hebrew letters).
Thanks to the user who reported this case, and thanks @Kipod for verifying!

Deprecated and removed. Thank you Jdforrester and Matmarex \o/

Change #1126107 merged by jenkins-bot:

[mediawiki/core@master] Drop wgEnotifImpersonal and wgEnotifMaxRecips support, deprecated in 1.44

https://gerrit.wikimedia.org/r/1126107

Change #1137465 abandoned by Bartosz Dziewoński:

[mediawiki/core@master] Deprecate the AbortTalkPageEmailNotificationHook

Reason:

Superseded by https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1143833

https://gerrit.wikimedia.org/r/1137465

Change #1144698 merged by jenkins-bot:

[mediawiki/core@REL1_44] enotif: deprecate AbortTalkPageEmailNotification hook

https://gerrit.wikimedia.org/r/1144698

Change #1144698 had a related patch set uploaded (by Bartosz Dziewoński; author: Pmiazga):

[mediawiki/core@REL1_44] enotif: deprecate AbortTalkPageEmailNotification hook

https://gerrit.wikimedia.org/r/1144698

Change #1143833 merged by jenkins-bot:

[mediawiki/core@master] enotif: deprecate AbortTalkPageEmailNotification hook

https://gerrit.wikimedia.org/r/1143833

Change #1143833 had a related patch set uploaded (by Pmiazga; author: Pmiazga):

[mediawiki/core@master] enotif: deprecate AbortTalkPageEmailNotification hook

https://gerrit.wikimedia.org/r/1143833

Change #1137041 abandoned by Pmiazga:

[mediawiki/core@master] WIP: ENotif: IDEA: Simplify system by dropping source

Reason:

Abandoning the change. The source is important to determine the notification type when handling Admin notifications.

https://gerrit.wikimedia.org/r/1137041

The patch has been deployed but the train is blocked on an issue we have with Gerrit ( T393034 ).

There was a Gerrit maintenance that started immediately after the patch got merged. It is now being deployed by Timo as part of another deployment!

Change #1140184 merged by jenkins-bot:

[mediawiki/core@wmf/1.44.0-wmf.25] EnotifNotifyJob: Forward-compat for wmf.27 jobs

https://gerrit.wikimedia.org/r/1140184

Matmarex has verified the patch works for him. I will look at deploying https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1140184 .

Looks good to me.

Test plan (on a local test wiki):

• Make sure jobs don't run automatically
• Switch to wmf.27
• Make some edits, causing some jobs to be generated
• Switch to wmf.25
• Run jobs – This should cause errors like in the task
• Apply the patch
• Run jobs again – This time they should succeed, and they should send correct email notifications

That patch is only for wmf.25 and should unblock the wmf.27 deployment.

Change #1140184 had a related patch set uploaded (by Bartosz Dziewoński; author: Bartosz Dziewoński):

[mediawiki/core@wmf/1.44.0-wmf.25] EnotifNotifyJob: Forward-compat for wmf.27 jobs

https://gerrit.wikimedia.org/r/1140184

So maybe just a deploy artifact during the time when the servers had mixed code, so wmf.27 created jobs that were processed by wmf.25?

rMW4dfbf67f4d63: Pass RecentChange back to EmailNotif changed EnotifNotifyJob (which eventually passes some of its parameters to RecentChangeMailComposer) to not have a timestamp. This is not a cross-wiki job; it would be understandable if existing jobs started to fail (because the job parameters were stored with the wmf.25 code but processed with the wmf.27 code) but this error seems to be the other way around - it's the old code that passed an explicit timestamp and the new one that doesn't (and the errors are also thrown on the old branch). So maybe just a deploy artifact during the time when the servers had mixed code, so wmf.27 created jobs that were processed by wmf.25? The error spike is not that narrow, but then wmf.27 jobs would keep erroring after the rollback so that's to be expected.

Change #1137465 had a related patch set uploaded (by Pmiazga; author: Pmiazga):

[mediawiki/core@master] Deprecate the AbortTalkPageEmailNotificationHook

https://gerrit.wikimedia.org/r/1137465

Change #1137036 merged by jenkins-bot:

[mediawiki/core@master] ENotif: Migrate the Watchlist notification

https://gerrit.wikimedia.org/r/1137036

Change #1137041 had a related patch set uploaded (by Pmiazga; author: Pmiazga):

[mediawiki/core@master] WIP: ENotif: IDEA: Simplify system by dropping source

https://gerrit.wikimedia.org/r/1137041

Change #1137036 had a related patch set uploaded (by Pmiazga; author: Pmiazga):

[mediawiki/core@master] ENotif: Migrate the Watchlist notification

https://gerrit.wikimedia.org/r/1137036

I have no memory of raising this bug...

Without having the user story updated, this looks like it can be closed as not a bug.

Note, for WMF wikis - in practice we don't hide users unless we are also locking users, which will alleviate the user story