https://github.com/code-423n4/2024-07-reserve/blob/main/contracts/plugins/assets/Asset.sol#L150-L163
The Asset contract implements a graceful fallback for being able to provide underlying asset prices when the upstream oracle is unreachable.
This fallback uses the last known price, but artificially widens its range (low-high) to offset the uncertainty over the stale price.
The math of how this offset is done is implemented with this code;
We can see that when the decay starts (delta == decayDelay), the saved high/low readings are returned unchanged; then they start diverging linearly: at the end of the decay (left limit of delta == decayDelay + priceTimeout) low reaches 0 and high is scaled up by a multiplier of FIX_ONE + MAX_HIGH_PRICE_BUFFER, that is 3x its cached value.
Referring to this chart, because the two values - low (blue)  and high (red) - diverge with a different slope, their average ((low + high) / 2, green) also varies over time and increases.
While this is not an issue for the Asset itself which doesnt directly combine the two values with an average, it can be for downstream contracts that may do.
Consider changing MAX_HIGH_PRICE_BUFFER to FIX_ONE instead.
