strange LED behavior when using NRP52 hardware

putting the firmware on NRP52 board (HW Rev. 2) the SF/BF LED to not behave as expected. If no configuration exists, no red LED is visible.

If configuration exists, no red LED is blinking.

Instead, some LEDs (depends on the ethernet port which has active link) are flickering in green/orange patterns.

The LEDs on the ethernet ports themself are completely off, although a link is established.

Note that netX52 NXLFW when using NXHX52 is not affected.