The recent Path of Exile patch added a Clear Cache button. The developer Grinding Gear Games explained to the community its features and why it was added in the first place. The patch he discussed is patch 3.14.1d. The status of the patch notes,

Now, the Path of Exile client can make more efficient use of POE Currency, which means that assets will maintain longer loading times. For systems with sufficient video memory, this will result in a significant reduction in assets loaded during the game. Added a clear cache button to the options. When we regularly clear Path of Exile’s cache, we can use this button as needed to try to solve problems that may be caused by invalid files or too large cache.

Since this is a patch that does not restart, you need to restart the client after the patch. But what about the Clear Cache button? Grinding Gear Games explained that the Clear Cache button will clear the Path of Exile several temporary storage locations used to download images and graphics shaders. After clearing the cached shaders, the client performance will temporarily decrease, and the client will regenerate the required shaders. Therefore, we recommend Buy POE Currency as a last resort only when troubleshooting crashes or other graphics issues, or when cache size has become an issue.

They pointed out that they are reviewing the results of this patch to resolve all unresolved issues. If you encounter any crashes while using Vulkan, please try DX11 and see what happened to the API, just in case, please contact the Path of Exile team and answer the community's questions about the game mechanics. Those who like weeding in ARPG can give it a try.