Copying text right now, best way is to click on 3 dot menu and get Edit history there copy particular part of text. Copying paragraph should be working, we are looking perfect solution for this as @melinda010100 also requested this feature and waiting for our delivery :) Solution we have, showed negative effects on performance.
RE: Filosofía del respaldo: Una comparación crítica de los argumentos en torno a una economía basada en oro y en papel desde la perspectiva filosófica.