This suggests two things: first, scarcity at the front end of the Bund cash market, as signalled by the wide swap spread, does not seem to have led to a rise in the specialness premium of shortdated bonds in the repo market of equal proportion.
Second, the specialness of medium to longterm bonds in the repo market has not translated into a similar spread widening between Bunds and OIS in the cash market. One way to make sense of these developments is to look at how bonds are channelled back into the (repo) market.