Requesting legend output changes legend behavior

In Matlab R2015b (64bit on Windows 7), the following two bits of code cause different legends to be displayed:

figure;
scatter(1:100,sin((1:100)/50*pi));
hold on;
scatter(1:100,cos((1:100)/50*pi));
legend('sin','cos');

figure;
scatter(1:100,sin((1:100)/50*pi));
hold on;
scatter(1:100,cos((1:100)/50*pi));
[eg,i,p,s] = legend('sin','cos');

The first line displays a legend with two entries having the same color (the "last" one) and the second line displays a legend having two different colors. Can somebody explain this? Surely, requesting output parameters should not have an effect on the legend itself, or should it?

[the cyclist]

Very strange!

I can tell you that I do not see that behavior in R2015b on OS X Yosemite.

[N. Otime]

Thanks for checking!

Answer 1

[Walter Roberson]

Known bug that affects scatter; there is a fix

[N. Otime]

Indeed my second line corresponds to work-around number 3 in the linked fix.

Thanks for the quick reply!