Ideas:

This type of glyph, I think, is a fusion between a standing person and a person sitting and eating. You should sit down when eating, enjoy your meal and not be disturbing by standing up.

In Tahua Aa1-71 there is a similar person:

Here it is possible to compare with parallel texts e.g. in Large Santiago, where we find two glyphs:

The irregular disturbing behaviour of Mercury could be described as similar to that of an intoxicated person, cfr the names of this planet in Polynesia.