This study explored teacher leadership functions during and post-school disruption, due to COVID-19 pandemic. Participants were recruited from three primary government schools in Qatar, and included 12 teachers, three vice-principals (assistant principals) and three principals. A phenomenological research design was employed using semi-structured interviews for data collection. Findings suggest nine teacher leadership functions during school closure, two of which only were sustained post-school reopening. The study argues that the regression in teacher leadership functions relates to the failure in the internalization of teacher leadership cultural norms and values. The study offers recommendations for policy and practice.