This issue is caused by small differences in the spacing of the time steps in the "timeseries" data of the signal due to finite precision of floats. You can resolve this by using "timetables" instead of a "timeseries" to create a uniform time step for the data in the "Signal Editor" block. For example, the following code will generate a sine wave with a sample rate of 0.001 seconds:
timestep=seconds(0.001);
inputvector=sin(2*pi*(0:0.001:200))';
TT = timetable(inputvector,'TimeStep',timestep);
Regards,
Carl
