I found bitwise-and operator having different behavior in calling via infix syntax and method. Is it expected behavior?

yes, because they mean

(-3).and(0xFF)
-(3.and(0xFF))

respectively

Ok thanks.

you can see this with all infix functions, for example

-1 to 1 // Pair(-1, 1)
-<http://1.to|1.to>(1) // ERROR Unresolved reference, because -Pair(1, 1) doesn't work