Getting pushed through the Portal would be quite the trick given how high it is off the ground.
I supposed getting pushed through the Exchange might be possible though, especially as people are making Power Cube sized bots.
Assuming that your robot was pushed through the Exchange, that normally would be a S05 violation that would require the robot to be disabled, but if the opponent did so in such a way that the referees deemed to be a strategy, it’d be C07 for the opponent which would negate the penalty for the tiny-bot and cause the opponent is get at least a Foul, and it would quite likely qualify for the “egregious” upgrade to Tech Foul and Yellow Card. Depending on how egregious it was considered, I wouldn’t rule out a T03 (or G14?) upgrade to Red Card.
It’s quite likely that even given C07 says to negate the penalty, tiny-bot would get disabled anyway, merely because having an active robot in a zone where there are humans is a safety concern, and the overarching language at the start of Chapter 5 applies where “Event staff have the final decision authority for all safety-related issues within a venue.” (That’s the rule that allows the field staff to, say, e-stop the field when a robot is on fire, even though one might only expect an S01 disable for the flaming robot. Seriously, safety trumps all other rules.)
I can’t imagine how it would be a Field Fault given that it doesn’t meet any of the criteria in section 10.8.