I have also the same issue.... my 2.4 ghz since the update drops to ridiculous speeds ( less than 1 MBps) from time to time or no connection at all! I read somewhere that is is major issue on this...

Hi ! Can you share also the link with me ? Thanks

@Kreco hi what is the support contact? I have also experience issues with the 2.4ghz wireless that gets very slow ( less than 1 Mbps) at reasonable range of the router. The 5 ghz in my case is fine .