I watched a video about it after Cybertruck release, but can't figure out which one it was mentioned in to share it, but basically, yes, the knew about this, its mentioned in the owners manual. If I recall correctly, the video mentioned that it should be covered when not in use, and it will suck if birds are shitting (uncovered) on it too.

Edit: Found link to Owners Manual breakdown / Video

https://www.teslarati.com/tesla-cybertruck-owners-manual-rev...

And from there found exact spot where it talks about maintenance / cleaning:

https://www.youtube.com/watch?v=OXY5zBpfGOw&t=1358s