There are a small number (334 currently) of deleted contacts with contributions. My guess is these are similar to those contacts we hit with issues due to scripts colliding & incomplete merges.
Nora fixed a few but we should repair the rest. I fixed 2 manually while looking just by doing restore from trash & re-merging them.
But I also found 1 with a larger donation (> $1k) who appears to have been deleted before we turned on logging -
& it's harder to know what to make of that one