Hi and thanks for this.

Could you please have a second look at this way:
https://www.openstreetmap.org/way/118769675/history/21

*:backward and *:forward speeds are both set as 30 kph, while those tags seem to contradict this.
source:maxspeed:backward=BE-BRU:urban
source:maxspeed:forward=sign

So, is it maxspeed:forward=50 here?