Hi Caio Porto,
I suspect the issue is due to U1 on the Talon ethernet card. The issue is the bi-directional level shifter leakage reverse drives the RESET_OUT line.
The part needs to be replaced with a pin compatible part such as: 74AVC1T45
The reason you don’t see the issue on the mangOH red is the the RESET_OUT circuit is buffered.
BR,
Chris