I've installed OpenWRT 19.07.2 for XiaoMi-R3P.
When I use Intel ax200（Xeon 1230v2/16GB/Win10/5GHz/876Mbps）to upload a big file to NAS, it's very slowly.
After some while, it maybe even cause the 5GHz WIFI of XiaoMi-R3P hung.
If I use factory firmware from XiaoMi, It's OK.