in split view - did not try yet.
mine versions:
appium 1.6.1-beta
java-client version is 4.1.2
mine logs when i do swipe Up (you did not say how you need to swipe :-):
scrollTo: u
screen width = 375
screen height = 667
x_start = 187
y_start = 662
y_end = 542
code is: ((AppiumDriver) driver).swipe(x_start, y_start, x_start, y_end, duration);