Fix regression when writing combination of np.NaN and None #5532
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| Job | Run time |
|---|---|
| 9s | |
| 9s | |
| 13m 1s | |
| 13m 1s | |
| 1m 34s | |
| 1m 34s | |
| 0s | |
| 0s | |
| 2h 50m 46s | |
| 1s | |
| 6s | |
| 3s | |
| 0s | |
| 0s | |
| 0s | |
| 1s | |
| 3h 20m 25s |