Default OTA 4.4.4 update not coming

I have my N7 (2013) since last May. It is completely stock.
A few weeks ago I had the 4.4.3 OTA update but no 4.4.4 yet.
Does anyone know why is that? As long as the 4.4.4 is the last update shouldn't it come directly "skipping" the 4.4.3?
Can I do anything except flashing it myself?

Thnx in advance

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