Thanks @Vovchik, you got me looking in the right place. I think the problem can
be fixed quite simply by adding one more condition to the if statement below:
https://github.com/numenta/nupic/blob/f1dd3ca676891f7370cf5404b3bbe432ac503f75/src/nupic/research/spatial_pooler.py#L1471
As-is, this condition will select winner columns that have no overlap with the
input vector. I believe one more condition needs to be added so the code looks
like this:
```python
if overlaps[i] > 0 and numBigger < numActive:
```
See it working with this change:
https://www.youtube.com/watch?v=BiMZvSbGZKs
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