Peak time and here we go again, @Yayzi_Team do you have any idea on dates for specific IP ranges for the switch? It’s definitely something to do with usage during peak times, in the week it starts at 4pm-ish and around 12pm on a weekend, and always ends just after 11pm.
During non-peak hours it’s fine.
Here’s a timeline of the degradation over a month or so
31st August
7th September
14th September
6th October
19th October
26th October