Hello, I was wondering why way more than half of the mints on my transactions list remain as the lowest of the two in the image below and never end up in my wallet.

It seems like the minting gets triggered, but gets lost. So, purely out of interest, is this normal and if yes, what causes it for some mints to happen propperly and some not?
My computer is always on, so that should not cause the loss. Theoretically though, if a mint gets triggered, can the wallet going offline cause it to get lost and if yes, what happens to the 40 NSR? Does someone else get it?
Thank you in advance!