Wio Terminal, eRPC communication, USART Overflow

[Cooler1989]

When trying to run wifi_scan example for Wio Terminal board I encountered issue with USART communication for Wifi driver.
Short debugging session shows that there are some calls to handing data empty (transmission) and few characters are received but in general first eRPC command (getting version) ends in the middle with panic and uart.read() in isr handler _handle_rx is returning atsamd_hal::sercom::uart::flags::Error::Overflow