I think you are very close to the solution.
I disable the Low-level SMART operations in the Stability preferences and the problem seems to be gone. I done that before reading your post, so I have not tried your solution. I find it strange that I did not try this before, has it is one of the 6 items that says it may cause crashes in rare cases. I still have the RAID SMART support enable.
I am not sure, I will have to check when I get on site, if I can currently read any of the sensors from the SMART drives.
I would suspect not, since you probably have to have the Low Level SMART operations enable to read things like temperatures and other things from any SMART drive even the none-raid ones.
This brings me to another question, the different devices in the Stability section of the preference, where can I read more about what each one does? Perhaps also with a example of a device that the particular option deals with. For example, if I disable the Dell SMI sensor support on a ASUS motherboard, will I lose any read capabilities? Or is that item exactly what the tin says and only applies to Dell motherboards? Is there a chance that even if I don't have a Dell motherboard some of the component are from Dell and I need that options on some other none-Dell boards?
The same goes for the Apple and Koolance items, If one does not have those items on a system, does it make AIDA64 perform its job better if they are disable even if they don't cause a crash or issues?
I will do what you suggested, and make the interval of the Disk temp polling frequency longer after re-enabling the Low-level SMART operations. I will report back here once I have the result.