Schrödinger's Russia
At the moment I see two cases of this, a long running, and a new "situational". There could be others.

1.
A. Russia is too weak to defeat Ukraine and couple billions more money and another round of sanctions finally will break her.
B. Russia is so strong it will attack NATO and in a week it will march into Paris

2.
A. Time works for Europe, Russia will be forced to her knees just a couple billions more money and another rounds of sanctions, the war surely will destroy her.
B. Russia doesn't want to make peace consciously sabotage the negotiations, and throws out peace offers because she wants to continue the war.