Invalid default platform tab content on page load for merged declarations

[atyrin]

My minimal reproducer includes:

• multiplatform library
• expect/actual declaration
• extra overload for one platform

Sample:

// common
expect class C() {
    /**
     * Fun f for common
     */
    fun f(p1: String)
}

// JVM
actual class C actual constructor() {
    /**
     * Fun f for JVM
     */
    actual fun f(p1: String){}
    fun f(p1: Int){}
}

// another platform
actual class C actual constructor() {
    /**
     * Fun f for another
     */
    actual fun f(p1: String){}
}

On the first opening of the class C page we will see (content for JVM is shown under Common)

After the tabs switching the content changed to expected:

N.B: it depends on how the function overridden, e.g. if we add fun f(p1: String, p2: Short){} everything will be fine

Dokka: 1.7.20
Option mergeImplicitExpectActualDeclarations = true is used