It's great that you raised this topic!
I will explain why I do not use this palette (Combo Palette)
--> Load from 4 color slot
--> save to a 4 color slot
--> sometimes Load from 4 color slot
--> sometimes nothing
--> sometimes filling out a few slots in blue (Glitch)
In my opinion, this is bad
My suggestion ... leave 2 options.
1. Choose colors from the slot to the bank:
Click - it's obvious.
2. Copy from the bank of 4 colors into the slot of 4 colors:
Shift + Click - it's familiar, anticipated, intuitive, safe
All other combinations must be Disabled!
Ctrl + Click -> nothing!
Right click -> nothing !!
Shift + Right Click -> nothing !!!
PS. Why is Shift + Click safe? Because it's intuitive.
I lost a lot of saved colors when I accidentally clicked Right click etc...
As a result, I refused this palette and began to use only Color arteset
See attached image...