Der Noise Generator funktioniert an den Chunkborders oft noch nicht ganz richtig.
Die Chunks laufen nicht flüssig ineinander über, teilweise sind brüche in der Welt.
MC-148665
Noise Generator bugs
Resolved
Duplicate
1
Kilian Hoesch
(Unassigned)
Unconfirmed
(Unassigned)
Minecraft 1.14 Pre-Release 5
Retrieved
First example doesn't really look like a noise generator issue, in fact it looks perfectly normal to me.
Second example is MC-125033.
Apart from that, for world generation issues, always include seed and coordinates please. We also only accept tickets in English.