Ideas:

1. If we compare this glyph with the corresponding glyph in Large Santiago, we can see that in this glyph there is no indication of disorder.

In Large St Petersburg the sign of disorder perhaps is delivered by the water in the preceding glyph.

2. And the two 'hiding' glyphs in Large Santiago are missing in Large St Petersburg. I cannot see how that information could be delivered by the preceding glyph. Is the information not necessary? Or can we find a sign of hiding in the following glyph?