Min and max values in seaborn violinplot are invalid

I'm plotting the distribution of daily returns from stock index in a particular year using seaborn violinplot. However some extreme values on the chart looks to be plotted improperly.

The chart below is an example for one year. As you can see the lowest value for 'Piątek' is something near -6.

sns.violinplot( x=wig20.iloc[1500:1751,3], y=wig20.iloc[1500:1751,2], width=1, order=['Poniedziałek','Wtorek','Środa','Czwartek','Piątek'])

Data looks like:

wig20.iloc[1500:1751,0:4].head()
           Date	     wig20	   [%]	     weekday
1500	2016-01-04	1804.42	-2.943818	Poniedziałek
1501	2016-01-05	1792.01	-0.687756	Wtorek
1502	2016-01-07	1745.46	-2.597642	Czwartek
1503	2016-01-08	1725.14	-1.164163	Piątek
1504	2016-01-11	1703.78	-1.238160	Poniedziałek

However when i checked the data i can see

wig20.iloc[1500:1751,2].min()
-4.533610974747937

So the chart is completely missleading. On the chart above the low for 'Piątek' is definitely below -5. I checked diffrent years and it seems that every max/min value of more than 4 is near the 6 on the chart and i have no clue why it is that way.

You can pass cut=0 to sns.violinplot to cut the violin plot at the minimum and maximum values.