Our developers are aware of the issue and are actively working on it. Thank you for reporting it.
Here is a workaround using the two-argument form of RegionNearest:
In[27]:= RegionNearest[regionLocal, pointsTemp[[1 ;; 5]]]
Out[27]= {{54.6271, 79.8945, 217.914}, {53.717, 80.0017, 228.54}, {54.3457, 79.5789, 223.376}, {56.4642, 101.333, 106.298}, {58.8283, 85.7725, 204.949}}
Hope this is helpful.
