You are most likely right. I may have mixed up the names. I thought I saw it at a board at the spot but don't have any fotos to double-check now.
I've removed the name, anyway, as it does not contribute anything to the viewpoint mark.
Thanks!

It's a full line all the way.
https://www.mapillary.com/app/?z=18.002058557365068&lat=48.2132680549&lng=16.37950601830005&pKey=201458618244224&focus=photo

I added a "no-u-turn" and now it seems ok.
https://i.imgur.com/76LS2Gv.png

What I'm concerned about is this: https://i.imgur.com/PROsfL1.png

Hi! Thanks a lot for the comments. OsmAnd does this when driving south from Praterstraße and wanting to get back to the same location. Going on Untere Donaustraße, a U-turn is suggested here, to turn south over the bridge (can't turn left from Untere DS here).

Hi, @michalfabik! Thanks for the feedback.

1) The local name is "Pjesacka staza br. 1" (without glyphs). However, there is also an English version next to it. See https://imgur.com/wrJ50Pu. I can adjust it, if that's the preferred option.

2) Yes, that's the common mark in BiH. Not sure if or how else I could better mark trails. This is my first time doing it and I've tried to do it the way they do it in Austria, which I find excellent.
In BiH there are no trail number markings or names, just the circle.