Hey Geez, from tech POV i understand 'not an issue with the launcher', but we talk about player affecting bugs here. The case is clear - the ping is estimated incorrectly. Are you saying cause it 'is how Steam estimates ping' Bohemia's awesome engineers can't figure out how to circumvent that?
For example a) you could escalate to Steam tech support and at the least notice the issue for them (which I assume done/tracked somewhere), b) see if the client could bypass steam's ping/latency approach with custom etc.