prvAcceptWaitClient gets interrupted with xSemaphoreTake while Tasks are suspended

Libraries
17

Unrelated to the actual problem, I would like to add that

if( pxClientSocket != NULL )
{
    FreeRTOS_printf( ( "prvAcceptWaitClient: client %p parent %p\n",
    ( void * ) pxClientSocket, ( void * ) pxParentSocket ) );
}

is generally a very slow operation and should probably not be used lightly in a semi-critical section like prvAcceptWaitClient creates, through disabling the scheduler. I mean everything else between vTaskSuspendAll(); and ( void ) xTaskResumeAll(); is just a handful of assembly lines.
Deleting the print is clearing up this race condition between a GMAC interrupt and the re-enabling of the scheduler but I am still a bit bewildered as how it can come to pass in the first place.