Let's make a necessary clarification.
GRCRT, DIO-TOOL and all the other User Scripts are, as we said, User Scripts.
These tools are made by users, players that like the game and want to improve the game experience with some cool buttons and features that keep following the game rules. We're glad to have such dedicated users, but the game code can't be changed to let the user script work. If the game has an update that (unfortunately, we don't want this) has compatibility issue with the tool, the tool has to be fixed. Not the game.
The reason why on beta the tool wasn't working while on german server was working is really really easy to understand, beta has updates every day so it runs on a different game version. That's why it's called Beta and not International.
With that said, the report cannot be accepted as a bug for the reasons already well explained, I can close this one. Thanks to everyone who participated in this discussion.