Guild Wars 2

I tried doing events in Silverwastes and Orr.

Every event I do, I earn 1000 Exp less than the previous event due to some kind of Diminishing Return bug, even though I am switching zones and doing different events(in Orr) and not the same event repeatedly.
The first even gives me about 18000 exp, then 17000, then lower and lower each event. I usually leave the zone by the time it hits 6000 exp per event or less.

I dont know how I will max out my Masteries compared to other players. They dont seem to have the same issue, a few even told me “never encountered this issue before”. Patch did not remove this issue. The game was patched about 3-4 times in the past few days, I am still getting this.

Experience Boosters dont really work because I keep getting less and less experience per event, rendering them pointless.

I am now contemplating about 8 million more exp to complete my first Mastery line of Pact Commander, and I dont see how I will reach this amount anytime soon because of this Diminishing Return thing. I even agreed to grind this amount of experience, it did not seem that big for me, but once I hit this impossible rock, I dont think I can proceed further.

So even players who agree to grind cannot proceed further? Tell me who can then.