Slow Gallery loading is a very common issue on LG G2 and lots of users are heard to complain about this. This situation may arise when you try to open the Gallery full of photos, and it takes long time to open. Also it may get stuck and stop the loading sometimes though the Internet connection is off in your device.
It is obvious that phone runs faster when all the other apps are closed, and Internet connection is off. Still you may face this issue but not to worry as the Slow Gallery Loads Issue in LG G2 can be fixed by discussing the reason behind it.
See also- How to fix LG G2 microphone issue
If there are tons of pictures in your gallery, then it will take time to load all the thumbnails and to organize them as per the user’s preference. But when the Gallery stops loading even though there is no Internet connection that refers you must have kept some photos in the cloud, and your accounts are synced with your LG G2 phone.
To fix the Slow Gallery Loads Issue in LG G2 first you need to un-sync all that accounts that are present in your phone like Facebook, Google+, Instagram, Pinterest etc. Try to remember if you have synced any accounts with the gallery app as this will require Internet connection to open the photo from the accounts. If the net connection is kept off and you try to open the gallery, then the app itself will try repeatedly to connect to the Internet, and finally the app is crashed if the process is unsuccessful repeatedly.
If you still face the Slow Gallery Loads Issue in LG G2 after un-synced, then go for clear cache and data to get rid of the problem permanently.