There are a number of cutscenes now where if an NPC is supposed to be sitting in a chair they will either be standing on it the whole time or alternate back and forth.
I'll try to make a list of them and add to this post assuming others don't beat me to it.
One is the conversation with Subcommander Kaol in the Dyson sphere arc where he talks to you about a possible dissenter within the Voth ranks. (Also when he slides the PADD to you, the desk is invisible.)
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