Wish I knew
Guess there may be several red flags in my case:
- nationality (Russian) + occupation (programmer): may potentially influence the election

- extensive travel history (no idea why many people with a big number of trips are sent to SS)
- strange travel history: I traveled to European countries, but then suddenly started visiting Istanbul (Turkey) once a month (tried to pass PTE-A for Australia actually) - even Russian border service often asks me about these trips when I cross the border