Another indicator that the russians are struggling with the ongoing economics of the war. Deferring salaries by a month for non-Ukraine engaged personnel.
Not optimal. Russia isn't going to tell us when their ability to sustain this war is starting to crumble, but there will be signs.
For a state that relies on the security services brutalizing dissent to maintain control, missing soldiers' paycheques is bad juju.
It also suggests that there is a maximum size to how big an army Moscow can support, and that they're likely at that limit. "Bottomless, Infinite Russia". LAFF. Only in terms of their brutality and depravity.