I see the same signs, I am thinking in the exact same direction as that unnamed official. Mostly because I lived under official 'martial law' for a while to understand what it means and when dictatorial governments reach for it: when they can no longer control the narrative. As soon as that becomes the danger martial law is on the menu, because it allows the government to crack down on the second order effects (since they can't do anything about the root cause, bad news is bad news).

The main thing that right now seems to keep martial law at bay in Russia is because, besides being a tacit admission that not all is well and that there is an internal problem in Russia that that would require Putin to give the military more power, something that he is absolutely loathe to do because that very same power could be used against him. But if not for that I am pretty sure we'd already be there.