After a while i decided to move the wallet to a machine with much better specs (i actually use it atm to mine Veil with CPU - Win10 - Ryzen 9 - 16 GB Ram - m2. SSD), no other wallets are running in this current machine and so far the wallet is running smoothly, no crashes, no errors, receiving stakes normally.
i dunno if the above info is helpful but i hope it made the situation a bit clearer for you.
I don’t think it’s about faster CPU and RAM. If you mine your never shutdown neither wallet nor machine, right? Probably this is why no such crashes as was described in my post. As it was already said the problem may lay in the "partial" wallet's shutdown with its process remaining active in background. Nevertheless time is needed to check this assumption.