Just spotted this thread. My SP31V2.0, bought in November 2019, tail-stands without an issue... so guess they fixed that. I bought it as a stop-gap to replace a Fenix PD35 that stopped working, and was blown away by the quality and performance for the price. Just received the latest Fenix PD35V2.0 to review on Ireland's Wildlife, and see very little between the Sofirn SP31 and the much more expensive Fenix model in terms of build quality and performance.

And my SP31V2.0 tail-stands perfectly... while the Fenix doesn't .