MCU restarts when waiting for a packet in RX state.

Hi,

I have a problem with nRF52832 after entering the radio RX state. I use a proprietary protocol with fixed packet length. Packet  transmission works fine, receiving the packet also works fine, when the packet is receivet within hundreds of microseconds after entering the RX state. But if the radio waits longer for a packet, the MCU restarts. The register RESETREAS contains zeros after restart, so the reason is unknown?? Does anyone have any ideas what may be the source of the problem?

Tahnks for any help in advance.

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