Whenever I add a new column within the attribute table and subsequently press "save changes" (also in the attribute table), the name of the column (header) will disappear and instead there are a bunch of symbols.
After restarting QGIS, all data that I previously entered in the attribute table is gone. This happens across all of my files. It wasn't always like this but has been for some months now.
I've already reinstalled QGIS a bunch of times (running 2.18.14 but had this problem with the previous LTR)
File Format: ESRI Shapefile
Has anyone had this problem and found a solution?