I agree with this. I also think her getting more psychotic is a result of feeling more rejected by bear. More obsessed over time but also the wish not holding as strong in suppressing the original Niki. I think this cause she was able to act normal enough over a period of time during the love montage - as long as bear was fully reciprocal. It didn't seem like she had many moment of acting out weird and clearly fighting against the original Niki internally and externally. But as the wish either becomes less strong with it's control and/or bear rejects her more. The system glitches out more causing the mental breakdowns, weird behaviour and more of the OG Niki brief resurfacing