Nd solve event locator limitations

Block[{n = 0}, NDSolve[{y'[t] == y[t], y[-1] == E^-1}, y, {t, 5}, Method -> {"EventLocator", "Event" -> Sin[π y[t]], "EventAction" :> n++}];n]

1

Block[{n = 0}, NDSolve[{y'[t] == y[t], y[-1] == E^-1}, y, {t, 5}, Method -> {"EventLocator", "Event" -> Sin[π y[t]], "EventAction" :> n++}, MaxStepSize -> 0.001];n]

1

Block[{n = 0}, NDSolve[{y'[t] == y[t], y[-1] == E^-1, z'[t] == D[Sin[π y[t]], t], z[-1] == Sin[π E^-1]}, {y, z}, {t, 10}, Method -> {"EventLocator", "Event" -> z[t], "EventAction" :> n++}, MaxSteps -> ∞];n]

1