Problems encountered when RT Box is used as the controller

Recently, when we used the RT Box 1 as the controller in our converter experiments, we observed a strange phenomenon. The circuit starts up normally at power-on, but after running for less than about one minute, one part of the system suddenly loses its waveform, which then causes the entire circuit to collapse. However, the RT Box itself does not report any error.

We would like to ask whether you have encountered a similar problem before, or whether you might have any suggestions for troubleshooting or solving it. I have attached the simulation file for your reference. If needed, I can also send the recorded video by email. Thank you very much!
model.plecs (518.3 KB)

Could someone give me some advice? :distorted_face: