counts=c(0.0, 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0007407407407407407,0.009777777777777778,0.013481481481481481,0.03807407407407407,0.06444444444444444,0.010814814814814815,0.002074074074074074,0.0026666666666666666,0.049185185185185186,1.277925925925926,0.542962962962963,0.13896296296296295,0.006074074074074074,0.015703703703703702,0.007703703703703704,0.005037037037037037,0.009925925925925927,0.044444444444444446,0.07466666666666667,0.058222222222222224,0.19274074074074074,0.10503703703703704,0.19111111111111112,0.1325925925925926,0.025777777777777778,0.006666666666666667,0.002962962962962963,0.003111111111111111,0.0025185185185185185,0.005037037037037037,0.020296296296296295,0.037037037037037035,0.032740740740740744,0.028148148148148148,0.00874074074074074,0.005629629629629629,0.0026666666666666666,0.0023703703703703703,0.002962962962962963,0.0025185185185185185,0.0057777777777777775,0.003703703703703704,0.003111111111111111,0.0025185185185185185,0.08222222222222222,0.2068148148148148,0.1448888888888889,0.2825185185185185,0.20962962962962964,0.15259259259259259,0.3465185185185185,0.025333333333333333,0.024148148148148148,0.04725925925925926,0.056,0.0597037037037037,0.060444444444444446,0.09037037037037036,0.27985185185185185,0.29214814814814816,0.10577777777777778,0.028592592592592593,0.007851851851851851,0.013481481481481481,0.02074074074074074,0.07703703703703704,0.3552592592592593)
(Note the value of element 42.) But refining the plot resolution to 1 Myr, which increased the number of time bins to 132, fixed the issue:
counts=c(0.0, 0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0007407407407407407,0.007703703703703704,0.005629629629629629,0.018962962962962963,0.02903703703703704,0.056296296296296296,0.015851851851851853,0.004148148148148148,0.001037037037037037,0.0014814814814814814,0.0026666666666666666,0.48814814814814816,0.8374814814814815,0.45022222222222225,0.21555555555555556,0.017777777777777778,0.0044444444444444444,0.012148148148148148,0.009185185185185185,0.0026666666666666666,0.0044444444444444444,0.006962962962962963,0.012592592592592593,0.05274074074074074,0.05674074074074074,0.04237037037037037,0.10251851851851852,0.13437037037037036,0.07674074074074073,0.12711111111111112,0.14562962962962964,0.06222222222222222,0.01451851851851852,0.005037037037037037,0.003111111111111111,0.002962962962962963,0.0016296296296296295,0.001925925925925926,0.001925925925925926,0.007703703703703704,0.016296296296296295,0.03111111111111111,0.021777777777777778,0.026222222222222223,0.018814814814814815,0.006666666666666667,0.0044444444444444444,0.004,0.001925925925925926,0.0014814814814814814,0.002074074074074074,0.0025185185185185185,0.0017777777777777779,0.004,0.0034074074074074076,0.003111111111111111,0.002074074074074074,0.0016296296296296295,0.010518518518518519,0.12029629629629629,0.15911111111111112,0.10681481481481482,0.15288888888888888,0.23777777777777778,0.13955555555555554,0.10844444444444444,0.2348148148148148,0.16503703703703704,0.016148148148148148,0.015259259259259259,0.02903703703703704,0.04044444444444444,0.042666666666666665,0.04622222222222222,0.040740740740740744,0.05140740740740741,0.07214814814814814,0.13955555555555554,0.31866666666666665,0.1445925925925926,0.07496296296296297,0.026074074074074072,0.006962962962962963,0.006074074074074074,0.010814814814814815,0.015407407407407408,0.01762962962962963,0.1497777777777778,0.2702222222222222)
The problem affects both PyRate v2.0 - 20190211 and PyRate v3.0 - 20200623.