moreover now i don't have burn rewards after return to fullbackup with 0.5 wallet about 3 days
Well, the network seems to be in a PoS minting phase right now ...
https://chainz.cryptoid.info/slm/#!extractionIt is possibly settling into a new equilibrium reflecting a lower PoW component but that's just a guess - the code is canonical.
Cheers
Graham
earlier it was about 1-10 rewards per day (i have 10K effective burnt coins so it 12-14 coins per reward)