Unable to answer "What overall color does this building have?" – Dresdner Verkehrsbetriebe AG [181] (Transit Shelter) – osm.org/way/1085674153 via StreetComplete_ee 60.3:

Its mainly glass, with brown pillars.

Which colour value should be tagged?

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) – osm.org/way/427816047 via StreetComplete 61.0:

There is no sign.

Unable to answer "What kind of service building is this?" – Sachsen Netze (Service Building) – osm.org/way/1079669539 via StreetComplete_ee 61.0:

Something with gas. Unclear if pumping or pressure reduction or sth. else.

Attached photo(s):
https://streetcomplete.app/p/278411.jpg

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