do you happen to be on a server where there is way too many complex-looking bricks
iirc this happens when you run out of graphics memory or something along those lines. all i know for sure is it happened to me and a bunch other people on an old version of the farming server where someone had like 5k blueberry plants, and it would happen as soon as you looked at the bricks after ghosting them (eg if you were too far away to see them you were ok)