Hello @Junion , pretty sorry to hear about that and really appreciate your participation on the forum.
As you correctly pointed out, the pricing of price-correlated assets is not yet unified on all networks to perfectly (with the best underlying feeds) use the solution we developed on https://governance.aave.com/t/bgd-generalised-price-sync-adapters/11416. The reason of that on Arbitrum was that during the listing of wstETH, the price feeds of Chainlink for the “sync” solution were not available (e.g. wstETH/ETH or stETH/ETH), as we pointed out that HERE.
We have worked with Chainlink to get those required feeds released, and we will do a governance proposal this upcoming week to update that, together with other pricing methods, like WBTC on Aave v2, pending at the moment.
Regarding the refund, from our perspective, being clearly disclosed before the listing, not sure if this should be covered, as users going really high in LTV should be aware of long-tail risks like this.
But at the same time, it is a bit of an exceptional case, so we encourage you to gather more feedback from the community and potentially create a Snapshot.