When I've generated new chunks in 1.14.2, a few chunks will generate that clearly do not belong to the correct biome. Sometimes it's not that bad of a problem, with only a few errant chunks appearing, but other times the terrain becomes almost unrecognizable, like when lots of Sunflower Plains chunks generate right next to some Deep Ocean chunks. I can interact with the errant chunks just fine, breaking and placing blocks and walking/swimming through the chunks.

I've included screenshots from two Survival worlds. I tried generating some new chunks in a Creative world to see if the problem would happen there too, but everything looked fine there. I haven't tried creating an entirely new world yet, though.