Thumbnail of last photo not appearing in Camera app, unable to access gallery from camera.

[AC Question]

When I open up my camera app, the area where the thumbnail of the last photo is supposed to appear in the bottom right hand corner of the screen comes up as a grey block with the gallery symbol on it. When I tap this block, gallery will not launch around 90% of the time. I have gotten the gallery app to launch twice from the thumbnail box, but only right after opening Camera. I have tried clearing data and caches on my gallery and other camera apps to no avail. Has anyone encountered this error or know of a solution?