The digital representation of our past has long been an important tool in the interpretation of cultural heritage in museums. The recent rise in the use of Augmented Reality (AR) has seen various approaches to adding dynamic information to existent artefacts. The challenge is even greater when uncertainty further complexifies the represented history. This paper presents a critical analysis of an AR installation in the Sacra Infermeria museum in Valletta, Malta. After a description of the AR configuration of the installation, we present a thematic analysis carried out from a multidisciplinary focus group of 11 researchers in the field of Interactive Digital Narratives (IDN), from three perspectives: the technological implementation of the AR experience, the historical accuracy, gamification and the influence of social media-centred design, and the representation of the complexity arising from the uncertainty of history. In the light of the results of the multidisciplinary focus group, we provide a list of recommendations and heuristics at the end of the article.