reactiveMap does not work with size/delete

I have noticed that

reactiveMap

reactiveMap

does not trigger update on

delete

delete

or when we "subscribe" using

size

size

forEach

forEach

method.
Most confusing for me is

delete

delete

since if i use

has

has

i expect that update will trigger signal, but this is not the case.

Is it expected behaviour ?

reactiveMap does not work with size/delete - SolidJS