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Something is happening but I'm not sure what yet.

This could just be a local counter offensive, it could be a local counter offensive used to divert the Russians from their real offensive that will head through Zapro, or this could even be their real offensive and they are not going to go for Zapro. The goal of the offensive might just be to save Bahkmut, though that would imply that they felt they did not have the resources for a proper offensive, as you would think Zapro would be a much more enticing target than just delaying the capture of Bahkmut.