Recently, I cleared up my ios devices and reinstalled several softwares include Accordance.
So, I tried to mobile sync from macbook pro (osx 10.14.6) to my ipad pro (ipados 13.1) and my iphone (ios 12.4.1).
Each of accordance programs were latest versions, 12.3.6 for my mac and 3.0.3 for ipad and iphone.
But, I realized that the files contain apostrophe or some special characters like "ö" were missing after mobile sync from mac to my ios devices.
As far as I remember, all the modules were there when I synced previously.
I don't know whether this problem came from my settings or it is just a bug.
Do you have any suggestion I can do?