Yes, there are known issues with the FreeRTOS+Sockets API and the latest STM32CubeMX HAL version for the H7 series. These include bugs in CubeMX 6.0 and incorrect generation of the main file. Updating to the latest version of STM32CubeMX and manually editing the ioc-file and FREERTOS-STM32F4xx_Configs.xml file may solve the issues.