iBus-SKK resets private jisyo file

I have no idea why the fact I will write below would be happened. I use Dropbox from my office Mac, private Mac, private Linux, and sync SKK private jisyo file via Dropbox.

When using Mac client, there is no problem. But I use Linux, my private jisyo file would be reset when input or translate Japanese via iBus-SKK. I found other articles about similar issue. Most of these cases were caused miss iBus configuration. These cases summary is that the place where private jisyo file is located in default configuration of iBus-SKK is not existed as default. So create new directory like ~/.config/skk - I forgot already - makes this issue resolved, but the issue I faced is different from miss configuration.

I feel frustration if SKK wouldn't work fine. I had better consider to stop using Linux and come back Mac again for SKK.