1. A computerized method, implemented by a processing unit, for automatically tuning a combustor of a gas turbine (GT) engine to address the occurrences of flashback events, the method comprising: monitoring one or more low-frequency dynamics within the GT engine; detecting a spike in the one or more monitored low-frequency dynamics; determining whether an amplitude measured from the spike satisfies at least one flashback criterion; when the spike's measured amplitude satisfies the at least one flashback criterion: (1) adding a count to a running record of spikes detected from the GT engine; (2) identifying that a number of spikes that satisfy the at least one flashback criterion that are detected within a predefined time interval surpasses a threshold number; (3) causing a flashback-addressing action to commence, wherein the flashback-addressing action serves to influence the occurrences of flashback events within the GT engine; and when the monitored one or more low-frequency dynamics do not satisfy at least one flashback criterion, refraining from causing the flashback-addressing action.