@TP-Link No issues or problem, but the 1.5.3(EU) changelog say "Optimized total performance" and it is a good improvement I would like to have. It's safe to apply this Eu firmware on the US version?...

I have 3 deco m9 plus. 2 of them are US version v2 1 is US and version v2.8 At US site the latest version is 1.5.1 for v2 and don't have v2.8 available, but at FI(EU) site there are v2, v2.8 and 2.20...