Comment 8 for bug 1675513

specifically https://github.com/snapcore/snapcraft/commit/20b422459119000640fa4103fe097eca5440f920#diff-e8d25d56f5ed513cad7c55002a709f32R316

The issue arises for arm builders because they are located in the US so the latency is much higher, whereas for amd64 the latency within London is always <2ms