Russian renewal of attacks off to slow start

 ISW:

The current Russian offensive may secure limited additional territorial gains in Donbas northeast of the E40 highway but will likely culminate before seizing major populated areas such as Slovyansk or Bakhmut. Russian forces have not made significant advances towards Slovyansk or along the Siversk-Bakhmut salient in the past few weeks and are continuing to degrade their own offensive combat power in localized fights for small and relatively unimportant settlements throughout Donetsk Oblast. Russian troops have notably been attempting to take Siversk since the capture of Lysychansk and the Luhansk Oblast border on July 3 and have still not reached the city as of July 20.[1] Similarly, Russian troops have failed to launch direct assaults on Bakhmut and have largely impaled themselves on fights for small settlements to its east and south. Efforts to advance on Slovyansk have mostly ground to a halt and have made no meaningful gains for weeks. The renewal of active ground offensives following the brief operational pause has not yet translated into meaningful Russian forward progress, although it is possible that either steady Russian pressure or the completion of Russian efforts to rebuild combat power could generate limited gains in the coming days or weeks.

Russian troops are now struggling to move across relatively sparsely-settled and open terrain.  They will encounter terrain much more conducive to the Ukrainian defenders the closer they get to the E40 around Slovyansk and Bakhmut due to the increasing population density and built-up nature of these areas (see map in-line with text). The current Russian offensive in Donbas is therefore highly likely to culminate somewhere along the E40 in the coming weeks.

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It looks like Russian combat power has not been adequately renewed after the significant losses they suffered since the beginning of the "special operation."  They are apparently trying to replace their losses with inadequately trained recruits and older people.

See, also:

 Russia has taken 60,000 casualties in Ukraine: CIA chief

This estimate includes killed and wounded.  They are a testament to Putin's miscalculation in Ukraine. 

And:

A Village Retaken, and a Confidence Boost for Ukraine’s Troops

A Ukrainian brigade surprised Russian forces, scoring a rare success in the east and sending an intimidating signal to other units.