I'm in a P1 alliance (second half of P1, not even trying to push to master), we met the same alliance in both last and this season, the interesting thing is, this alliance was No.3 last season, currently is No.4 this season (they changed alliance name this season). We basically gave up and didn't try to win at all because their rank is so high, but at the end of those wars, we were also pretty sure they don't belong to their position , because it always took about 10+ deaths for them to clean the map (well, they are still better than us).
We got our master title a few months ago and we know how difficult it is, that's the reason we don't want to push again, we are very comfortable in P1. We occasionally had wars with those master alliance like L.V.T, 4Loki, DSVG, SSX-1. In my impression, they always cleaned the map with 5-10 deaths, or even less. However, this alliance, they always have over 10 deaths (I searched in youtube, they had 13 deaths against DSVG this season, and 14 deaths against NewN last season), even 10+ against us (P1 alliance) and another P3 alliance this season.
The other interesting thing is, I watched a lot of master alliance video on Youtube, and I can only find DSVG, NewN and LVT had war with them in this and the last season, no other master alliance ever met them, so I guess most of the time, they had was against P1/P2/P3 alliances.
It's just unrealistically lucky for them, I'm even wondering this is because something weird happening in the war match algorithm, or they have some trick to do this? To be honest, it has no impact on us, but it's not fair to those master alliances.
Their panel
This seasonThis is a P3 alliance

This is DSVG and them

This is a P1 alliance

Last season (they changed name)