  The nature of energy dissipation in 2D superconductors under perpendicular
magnetic field at small current excitations has been extensively studied over
the past two decades. However, dissipation mechanisms at high current drives
remain largely unexplored. Here we report on the distinct behavior of energy
dissipation in the AlOx/KTaO$_3$ (111) system hosting 2D superconductivity in
the intermediate disorder regime. The results show that below the Berezinskii
Kosterlitz Thouless (BKT) phase transition temperature ($T_\mathrm{BKT}$),
hot-spots and Larkin Ovchinnikov type flux-flow instability (FFI) are the major
channels of dissipation, leading to pronounced voltage instability at large
currents. Furthermore, such FFI leads to a rare observation of clockwise
hysteresis in current-voltage characteristics within the temperature range
$T_\mathrm{BKT} < T < T_\mathrm{C}$ ($T_\mathrm{C}$ is superconducting
transition temperature). These findings deepen our understanding of how a BKT
system ultimately transforms to a normal state under increasing current.
