我设法修复它与：

object HighlightDefaults {

    fun OffsetMapping.Companion.offsetMappingSingleComposition(
        lengthText: Int
    ) = object : OffsetMapping {
        override fun originalToTransformed(offset: Int) = lengthText
        override fun transformedToOriginal(offset: Int) = offset
    }
}

...
visualTransformation = {
    TransformedText(
        it.copy(spanStyles = spanStyles),
        OffsetMapping.offsetMappingSingleComposition(it.length)
    )
}
...

result