The long beep means that the tailgate has been interrupted by a perceived obstacle and decided to stop for safety reasons.
Your gate might require lubing or alignment. Mine did this once (opened halfway, halted with three short beeps, tried to self-close, couldn't, long beep stop - was able to manually fully open and close it myself by hand), had Subaru have a look at it, and it hasn't done it again since.
Your gate might require lubing or alignment. Mine did this once (opened halfway, halted with three short beeps, tried to self-close, couldn't, long beep stop - was able to manually fully open and close it myself by hand), had Subaru have a look at it, and it hasn't done it again since.