Forgive me if this isnt a bug but I just started using the Starfinder ruleset again. My players are first level, we are playing the Swarm AP, whenever my low level creature rolls a 20 it says critical. Once I roll damage it says resisted 0 and this happens for every character. I first thought it was because the android might have something special since it is part construct but then I don't find anything that states any resistances versus crits. If this isnt a bug I will remove this question to cleanup this reporting section.
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UPDATE:
The issue had to do with the Swarm Dredger having untyped damage. I was able to locate the issue once I used a different creature to attack my PC. The damage type for the Swarm Dredger should be S for slashing. This creature can be found in Attack of the Swarm AP: Fate of the Fifth.