I understand why Ukraine is attacking targets in Russia it is dangerous because Putin could use that to justify widening the war by using conscripts. So far, Putin screwed up by pretending his invasion was not a war because under the Russian constitution conscripts (which make up 80% to 90% of the Russian military) can'tbe used unless Russia is attacked.
That is why Russia has been so short of manpower so far. I am not sure it is worth the risk of Russia possibly getting to increase its usable force size by 500%.
There was an assassination attempt on one of Putin's top inside supporters. He switched cars at the last minute and so survived but his equally awful daughter was killed in the explosion. A supposed Russian partisan group who aims to overthrow Putin supposedly claimed responsibility.