Strange Behavior (Translation missing on device)

Hi. I am using the latest version of I2 Localization (2.8.7) and Unity 2018.1.6. Today I updated /added a few new terms to my game and it all works as expected in Unity Editor. However, when I deploy the game on device (both an iPhone 6s Plus and iPad Pro), the terms I modified/updated are missing all translations except the default language, while existing terms works just fine. For example I have add a new term which is a sprite type. When I changed the language in the game (with I2 's "I2.Loc.LocalizationManager.CurrentLanguageCode"), the UI Image with this term has changed to a plain white block, which is the same as when the sprite is missing.
What's more interesting is that if I keep the language as the one that has missing translations and force close the game then restart the game, the current translation of the term of this language will become correctly again, where other languages are still missing. So in a strange way, I can make all languages of the abnormal terms behave correctly by switching to that language and terminate the app and restart..... Also, some translations of the newly added terms are just not updated on device (still showing the translations before the update), as if there is some sort of "cache" that stores the old translations . This is very very strange and I cannot figure out why... Please help as it's affecting my soon to be updated game, thank you.

Hi Frank, thank you for your reply. When the problem happens, the Google Update Frequency is already set to "NEVER" (I have been using I2 Loc for a few years so I'm kinda aware of this caveat, so I set it to "NEVER" at the very first days of the development. My game was published online half a year ago and has been updated more than 5 times by far and the issue I described never happened until recently I updated to the latest version of I2 and Unity (2018)). However, I do notice that there is a new "Password" option for the Google Spreadsheet in the latest version of I2 and I filled the password in and Exported the translations to Google a few times (only to use Google Translate to save time. Maybe this new password option can be the source of the problem? (Maybe the plugin will still use the cached/online translation data before I added the password to the plugin in some unknown conditions even if the option is set to Never?)

I'm getting similar reports from my users after updating to 2.8.7. Translations getting lost. Perhaps this is something to do with the auto-unloading of languages stuff?

I found a user with this problem and I'm about to send her a TestFlight build that's the same as her current build except the "unloading of languages" is disabled. Hopefully this will stop the crashing on her iPhone due to missing translations.

I've seen this once before when I had Google docs refresh enabled and devices started having missing translations. I ended up setting them to never refresh which seemed to fix the problem. I think something is broken with caching languages out to temporary files (on certain devices). To be honest, these features just don't seem bullet-proof enough yet for commercial products.

I can confirm from two testers that turning off Language Unloading has fixed the problems and I've submitted a new build to the App Store for review. This bug is causing problems for hundreds of users and the bad reviews are streaming in! Hopefully it won't cause any long-term damage to our review scores!