Hello. Thanks for mapping. 
Please be sure an object is a building. Here you mapped 2 trees as a building.

check the object. check for rooflines, shadow and  proof of living activity like a piece of lighter ground around an object, or paths leading to it.
On another changeset you mapped 3 pieces of farmland as a building. No proof of any building .
Best regards and keep mapping
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            Published using OSMCha: https://osmcha.org/changesets/147488155
            