I have had this same issue occasionally. when it happens, I try a second time and it usually works. words of advise: always choose a picture BEFORE writing a long description. you may loose your whole post if it does indeed glitch when adding your pic. sorry this isn't more helpful, rarely does it not take the second time I try after it doesn't the first time. - tuesday737  1076.5 #78 9:06AM

It seems to be a quirk with android, but yes i agree that tuesday737 has the best way to work around it - ribidib  403.8 #325 9:16AM

I have this problem on ocassion especially if my phone is full of hundreds of pictures in general so one of two usually work, delete some pics or turn your phone off then on and that usually fixes the issue. - pikarich  610.8 #178 10:33AM

Uh, been trying to get this to work all day and still no dice. I've had it happen from time to time before, so I knew to try multiple times and do it before I typed my caption, and still didn't work. Tried it with several different sizes, even down to 150x150 pixels and still wouldn't do it. Even uninstalled and reinstalled and no luck. I guess my phone just doesn't feel like it. - Sarafina  398.6 #335 4:52PM