Using a recent commit of CLN but I remember noticing this going back years.

When trying to prune the database of failed forwards, I noticed autoclean-once leaves some 20 million items uncleaned while only cleaning a very small percentage of total failed forwards:

lightning-cli autoclean-once 60
{
   "autoclean": {
      "failedforwards": {
         "cleaned": 3023,
         "uncleaned": 20587161
      }
   }
}

Using an age of 1 minute should basically prune all of it, but CLN doesn't care?