Of all the mediums I have encountered, I don’t believe I have seen one where people are quicker to assume malice on the part of the other than through chat.
If someone disconnects, they’re not having computer troubles, or dealing with an update. They’re just bored with you.
If someone is silent, they’re not unsure of what to say, or dealing with multiple things. They just hate you because you’re boring.
If you’re both silent for an extended period, then the responsibility is clearly the other person’s, and your part is to hound them to speak up, instead of trying to initiate further conversation. Because as we all know, it only takes one person to have a conversation.