Uranus tileset on EARTH?

[-EVIL-Snowtime]

Hi DE!A few weeks ago I went to the Earth solo to scan plants for apotics.I wanted to go to the 1-2lvl etermination,but when mission loaded,I was.... In Uranus tileset!On extermination!With 1-2 enemy levels.Screenshots will be included today included

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[Arkvold]

It's the Grineer Sealab Tileset because the mission is Mariana.  As in, the Mariana Trench.  This is not a bug - it's actually a preview of the Grineer Sealab tileset that was added in Specters of the Rail, as a teaser of what you had to look forward to later in the game.

The Sealab tileset on Mariana, Earth, is designed specifically to never feature Submersible Archwing map tiles, so you don't need to complete The Archwing quest to do it.