bxl-forever
Yes, there was a data problem here, namely a missing connector between a road and a footway.  Thanks for reporting it.

It should be fixed now.  It might take a few hours before the routing engines refresh their datasets.

I did some changes here because there were many other issues.  I am not familiar with how everything connects under the bridge but it should at least work.  I’ll try to improve it further if I can find some time to survey.  (I was there last week but only on the bridge.)