Wrong rect coordinate from getCurrentSelection()

[marshal1919]

When running test-app,some highlights in table content page would be misaligned.
While tarcking the running process I found that the rect coordinate returned by js:getCurrentSelection() was incorrect.
Why?

export function getCurrentSelection() {
  const text = getCurrentSelectionText();
  if (!text) {
    return null;
  }
  const rect = getSelectionRect();
  return { text, rect };
}

private fun showHighlightPopupWithStyle(style: Highlight.Style) =
        viewLifecycleOwner.lifecycleScope.launch {
            viewLifecycleOwner.repeatOnLifecycle(Lifecycle.State.STARTED) {
                // Get the rect of the current selection to know where to position the highlight
                // popup.
                (navigator as? SelectableNavigator)?.currentSelection()?.rect?.let { selectionRect ->
                    showHighlightPopup(selectionRect, style)
                }
            }
        }

[mickael-menu]

Please open a bug report issue describing all the steps to reproduce the issue:

https://github.com/readium/kotlin-toolkit/issues/new?assignees=&labels=&projects=&template=bug_report.md&title=