The default parameter "Upright" is not syncronized over the network at all by default, putting it in the parameters as a user specified parameter causes it to be syncronized on avatar load but it does not update after the initial load, clicking reset avatar will set it to its current (local) value however again itll be stuck at this value and will not syncronize updated values over the network.

Suggested behaviour:

Please make the non user definied parameters (especially Upright) syncronize over the network, as in continously update their value like it does locally. These parameters especially upright is very useful for certain effects that wont be possible without them syncronizing properly.