I just self destructed on the first mat floor but it reports I have a score of 22,406!
This just so happens to be the score of my previous run...
So yeah, bug.
Hi Hippasus, yeah I've heard of this happening once before, last year, but can't actually repeat it. (The one case I have on record actually happened in the Scrapyard, even...) There must be something really weird about the conditions, because people self-destruct there fairly frequently and it doesn't normally occur. Pretty sure this started becoming a (rare) thing due to the scoresheet overhaul for Beta 9.
I need more data in order to solve something like this, like a save file would be ideal, in case there's something involved there, but of course unless you made a backup manually, you likely won't have a save from before you self-destructed since run data is removed at that point. (The only way you'd have a save is if you had stopped the run on an earlier day, since your save would be backed up as part of the daily backups, but that's a rare and unlikely coincidence for an early-game run...)
Interestingly we don't even have scoresheets for runs below-9, so we can't even investigate that for details xD (that's done to keep all those scoresheets from polluting the data for "real" runs that get off the ground)
Wish I knew how to repeat it, since this is the second time now. Guess I'll try again and see...
Okay, I've managed to repeat and solve this one, thanks :)
I realized that the only difference between the two reported instances and my own tests were that a scoresheet wasn't produced in your case (due to the depth), whereas I test in debug mode which always produces a scoresheet. Easily repeatable as long as a run ends normally and produces a scoresheet, then you self-destruct before -9 in the next run in the same session.
(Since no scoresheet was produced the tally was not actually recalculated under the new system introduced for Beta 9.)