Is it possible to win promos and completely skip a rank?

So i just got placed this season and was placed in bronze 4, I played and got to promos then won promos and now it says i'm in bronze 2 with 0 LP. Is this possible or is it just a bug? Its almost like I got 100 LP from 1 game.
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We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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