Every "watch mode" Actor in our catalog — the ones that poll a source and only deliver new rows since the last run — keeps a baseline of ids it has already delivered, so it doesn't redeliver (and re-bill) the same row twice. We found a bug in how that baseline is capped, and it took 22 Actors to...
Source: [Dev.to](https://dev.to/fetchsmith/we-nearly-charged-our-own-buyers-twice-for-rows-theyd-already-paid-for-1pde)