That did it. I had given Veronica a fully modded out Power Fist and now she's lost it. I have no idea how it happened. The only casino we went into was the Atomic Wangler, which doesn't take your weapons anyway.
I already had issues with Cass losing Dinner Bell, now it's Veronica. Best I can tell is that some enemy must have targeted it and it lost all it's condition, after which it gets dropped. The problem is I have no idea where she might have dropped it as we've been in several battles. The thing cost a fortune to buy and mod so I'm not going to bother trying again.
Is there any 'trick' or even a mod out there that stops companions from losing their gear? I hate to leave them with just their default weapons, but I really don't have much choice anymore.