Yes, this must be because the Corsair Link protocol is quite unstable and sometimes HWiNFO is not able to read correct values.
Can you please attach a HWiNFO Debug File capturing such situation ?
Thank you. I can see that indeed the protocol reading data from PSU is very erratic.
I'll change it so that the next build of HWiNFO when unable to read some value will show the previous valid instead of not showing it. This will avoid the flickering in RTSS, however the user won't know if the value showing there is valid, or a previous value since HWiNFO wasn't able to retrieve the actual one.
In HWiNFO sensors screen, such a value will be shown in grey color to denote that it's not the actual one.