Extra line overlaping zero line

at the bottom there is line with color of trace that overlaps zero line, first I thought maybe I had added color to zero line accidentally but thats not the case, if you zoom (2nd pic) you can see its a trace, and I dont have plot on those coordinates I have checked my data and also if there were data on those coordinates plotly addes some annotations when we hover but thats not happeing here, so 100% sure that line is not gettong plotted using data. is this some sort of artifact? Since I have three plots and 2 plots with data close to zero line have that extra line while the 3rd plot which doesnt have points close to zero line doesn’t seem to have this issue.