Hi rademalis,
Here:
https://www.openstreetmap.org/way/1286792889#map=19/54.024627/18.344184
you have:
natural=pond
water=lake
Now what is it?
A pond or a lake?
The accepted way of tagging is:
natural=water
water=pond (or lake, but something cannot be both)

Can you fix it?

Best regards  
Marc Zoutendijk  
OpenStreetMap Foundation  
Data Working Group  