This "thing" that is mapped as one building are in fact many independent buildings build next to each other, touching.

Needs remapping.

The two 'railway=signal' have 'fixme=[See note at this location.]', but I cannot find any note here.
What is the actual issue?

via StreetComplete_ee 61.0

Unable to answer "What’s the height limit below the bridge?" – Königsbrücker Straße [B 97] (Primary Road) – way/427816047 via StreetComplete 61.0:

There is no sign.

Here is an artificial body of water.

via StreetComplete_ee 60.3

Attached photo(s):
https://streetcomplete.app/p/278156.jpg

Somewhere here there is an (artificial) lake.

A path branches off here (in the picture to the right).

via StreetComplete_ee 60.3

Attached photo(s):
https://streetcomplete.app/p/278125.jpg

Here is the other end of the path across the meadow (in the picture on the left).

via StreetComplete_ee 60.3

Attached photo(s):
https://streetcomplete.app/p/278126.jpg

Some unknown locked access shaft.

via StreetComplete_ee 60.3

Attached photo(s):
https://streetcomplete.app/p/278176.jpg
https://streetcomplete.app/p/278177.jpg

Access track to the body of water.

via StreetComplete_ee 60.3

Attached photo(s):
https://streetcomplete.app/p/278172.jpg

Need to find a proper tag for this barrier made of tree branches.

via StreetComplete_ee 60.3

Attached photo(s):
https://streetcomplete.app/p/278166.jpg