InfoRequest level censor rule was not applied

[laurentS]

We received a message from a user requesting to hide their name from an incoming message. I added a censor rule on the info request, but it never was applied on the public page (I could see it in effect for admins), even several weeks later, which we found out after receiving a second request from the same person.

After running IncomingMessage.find(xxx)._cache_main_body_text in the console, the problem was fixed.
However, I wonder how this could happen. We are running sidekiq for background job queues, my understanding is that jobs should not be lost because of a server reboot or similar situations. What scenarii could lead to the job being skipped? Are there counter measures we can put in place to ensure this does not happen again?
We were running alaveteli 0.44.0.0 at the time of the bug. I came across #3959 which suggests that this was fixed several years ago.