@David-TP Thanks for the response David. I've sent an email. An earlier email from TP support suggested I was not able to downgrade firmware? Desperate to find a solution - I cannot tell you how...

@CheGuedara Am in the same boat. Terrible issues since the upgrade. Disconnections, lag, slow speeds. Any ideas on resolution TP link!?

@OnlyCORE I'm having the same issues. All fine until performing the firmware update this morning. Speeds now slow/inconsistent and very laggy with high ping. I have XE75 Pro. Any ideas on a solution?