If you do a search, this subject has been covered a few times. Quite a few on here and on other Tiger boards have the very same issue.
I think it has been a problem on all the new type Tigers (silver frame models) and pretty much everyone has been told, it will do no harm, etc, etc.
personally, I am like you - I would be very unhappy with this as i cannot believe it was designed operate in this manner.
You are the first I have heard of that Triumph has offered to investigate though