Given that dropbox sync used, next case may lead to partial data lose:
1 alter database on android but not uploaded (don't sync)
2 alter database with PC client
3 sync on android
Because after (2) dropbox will have newer DB - the altered but not uploaded DB on Android will be overwritten.
Probably auto sync on start and before close may lower chance for this.
Given that dropbox sync used, next case may lead to partial data lose:
1 alter database on android but not uploaded (don't sync)
2 alter database with PC client
3 sync on android
Because after (2) dropbox will have newer DB - the altered but not uploaded DB on Android will be overwritten.
Probably auto sync on start and before close may lower chance for this.