WRONG_INDENTATION: aligned chained method calls reported as false positives

[0x6675636b796f75676974687562]

Consider this code example:

fun LocalDateTime.updateTime(
    hour: Int? = null,
    minute: Int? = null,
    second: Int? = null,
): LocalDateTime = withHour(hour ?: getHour())
    .withMinute(minute ?: getMinute())
    .withSecond(second ?: getSecond())

Chained method calls in lines 6-7 are normally aligned (e. g.: IDEA does so). Yet, DiKTat reports this as an error, suggesting the following formatting. extendedIndentBeforeDot on (the default):

fun LocalDateTime.updateTime(
    hour: Int? = null,
    minute: Int? = null,
    second: Int? = null,
): LocalDateTime = withHour(hour ?: getHour())
        .withMinute(minute ?: getMinute())
                .withSecond(second ?: getSecond())

— and extendedIndentBeforeDot off:

fun LocalDateTime.updateTime(
    hour: Int? = null,
    minute: Int? = null,
    second: Int? = null,
): LocalDateTime = withHour(hour ?: getHour())
    .withMinute(minute ?: getMinute())
        .withSecond(second ?: getSecond())

The corresponding IDEA code style flag is CONTINUATION_INDENT_FOR_CHAINED_CALLS, on by default.

[0x6675636b796f75676974687562]

A prerequisite for this is an expression-body function, i. e. none of the below will trigger the issue:

val a = expression

val b =
        expression

val c
    get() =
            expression

fun d() {
    expression
}

while this may:

fun e() =
        expression

Minimal repro (assuming extendedIndentBeforeDot is on):

fun f() = first()
        .second()
        .third() // <- here, DiKTat suggest a double continuation indent (16) instead of a single continuation indent.

At the same time, this fragment produces no warnings (which is correct):

fun f() =
        first() // Continuation indent
                .second() // Double continuation indent
                .third() // Double continuation indent aligned

Another minimal repro:

fun f() = g(first()
        .second() // DiKTat suggest an indentation of 12
        .third() // DiKTat suggest an indentation of 20
        .fourth()) // DiKTat suggest an indentation of 28

Similarly, this fragment produces no warnings (which is correct, too):

fun f() = g(
        first()
                .second()
                .third()
                .fourth())