I've just looked at where you're training, and worked out that there must be at least two Grobs that have had dinged nosegear that took an unreasonable amount of months to replace.
As I recall, the story I heard was that a Grob at another UK airfield broke the nose leg and had a prop strike leading to the engine having to be taken apart. It took the best part of a year to get it back into the air.
Once seems unfortunate. Twice seems to make a trend.