Network conditions fluctuating - Fix your game

Anyone know how to fix and prevent this happening again? It used to be SOMETIMES, now its every other raid. Just lost 5 millions of loot, not including my own gear.

My connection is perfectly fine, fiber 1gb download/100mb upload. No issues at all in any other games and usage cases, very stable.

Windows 11 without any additional antivirus besides windows defender.

Yet the game kicks me out and ban for 1 hour, this is so fucking stupid.