I don't think so, but I can check. The thing is, before exiting the game entirely, I reloaded to the autosave (and it continued), then to a save just prior to the mission and the bug continued as well; once I exited the game and restarted it, that same save was fine. So it seems like a bug in the session itself, rather than the save.
I should also add one detail I forgot - I noticed that when a soldier had c4 in both hands, setting one for one or two turns made the other switch to a red "0" despite not being set (which would be "--"). I imagine this was true for every brick, hence why they all went off.