I think that's not really a bug; I have a lot of planets installed, so it's no surprise that at some time this error comes up. Factorio logs the recipe counts, and while some mods have recipes in the thousands, Rigor Module has the most, 13,603 ids according to the log.

I don't know if you can tackle this because I guess that's how your mod works, just wanted to inform you that the amount of recipes might explode. Maybe you can come up with a solution to this, otherwise of course I would have to deactivate some mods.

maybe for reference, those over 1,000, perhaps there's a combined effect with your mod that helps to evaluate the situation:
Flare Stack: 8496
Paracelsin: 5252
cargo_crates: 2469
color-coded-pipes: 2817
fruit: 1443
offshore-dump: 7986
panglia_planet: 8597
quality: 4869
rigor-module: 13603

Yes this is how the mod works, but 13.6k is still a bit excessive. I'm sure I can get some reduction. But I might need to also implement a kind of last-resort "defensive mode" where rigor will only be enabled for subset of valid recipes.

I've implemented a compatibility mode in v0.2.0. Enabling it will mean rigor modules will only work in recipes that have been explicitly whitelisted by another mod, but it will drastically reduce the number of recipes added.