I've only noticed this in Co-op when I am not the host, but occasionally, while I am not the host and select a Generator or a Research option, the result will give me something i didn't pick. My best guess is that it has something to do with the consistent latency issues.
Step by step of the bug
Step 1
Join someone's Co-op lobby.
Step 2
While in game, build a Generator or do a Research as the person not hosting.
Step 3
Repeat until you notice a Research or Generator result in a different outcome than what was selected
I've only noticed this in Co-op when I am not the host, but occasionally, while I am not the host and select a Generator or a Research option, the result will give me something i didn't pick. My best guess is that it has something to do with the consistent latency issues.