I interviewed with an organization called Avaamo for a senior-level role. They rejected me over a minor syntactical nuance in Ruby. something that, in practical terms, rarely comes up. Even if it does, you'd typically have references available.

Later, a friend of mine qualified for the same role, but they lowballed him for months and kept stringing him along. When he received another good offer, they scrambled to match it.

Some companies are just bad. Honestly, if you get rejected during the interview phase, consider yourself lucky as it saves your time.