Thanks. Currently it's showing the physical core numbers, so physical core #5 is deactivated on your CPU.
I will adjust this to show the logical continuous core numbers in the next build.
All Ryzen CPUs with less then 8 cores have some cores deactivated. HWiNFO takes that well into account, just the core numbers in per-core temperatures for some Zen1 CPUs are not displayed in the continuous format.