Packet loss on layer4/tcp whereas no packet loss on layer3/icmp

I am making an attempt to grasp a community downside I am dealing with.

I haven’t got any packet loss on a standard mtr verify (which is utilizing icmp, so osi layer3), however having enormous packet losses (>50%) on layer4/tcp.

(I am making an attempt to achieve a backend from a number of servers, solely one among them having this downside, so it is not the backend server however both the route or the calling server).

So I might say this isn’t a defective bodily connection downside (in any other case icmp/layer3 would have packet loss as nicely), it is also not a fallacious routing or the like as layer3 would have issues as nicely.

So does this simply present e.g. community congestion? Would this not present in icmp/layer3 however solely in tcp/layer4?

Or what else ought to I search for?

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