The eastern bypass of Vinkovci was opened in recent years. OSM indicated
D55 along the bypass but GM still has it on the through road. The (eastern) bypass has no numbering yet according to
September 2022 GSV. It think that
this is still the very same km post from
2019 indicating D55.
So, we likely have to wait for updated GSV.
Edit 2023-07-30: May 2023 GSV confirms that the bypass is not (yet) signed.
Edit 2024-06-30: April 2024 GSV shows no change.