DW1000-I-TR13 Interrupt Issues

We are seeing issues using the DW1000-I-TR13 for distancing measurements and hoped you could help. When the DW1000 is in responder mode using interrupts, interrupts are generated but the internal registers of the DW1000 read as if corrupted and even the IRQ flag is not set, which means we cannot run a responder in interrupt mode and have to poll it. This takes up over 50% of our CPU time which is not feasible in this application. This is not the case when in initiator mode as we can do without interrupts here. Is this an issue someone else has noticed or could it be to do with our setup?

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thumb up. the same problem.