Every time I load the map, the cape skin is just on base skin, when I reload it, it just loads the mod skin, but on a while

Please provide CustomSkinLoader.log, and clearify your description.

[2020-08-17 12:41:15] [Render thread INFO] CustomSkinLoader 14.12
[2020-08-17 12:41:15] [Render thread INFO] DataDir: C:\Users\HOST\AppData\Roaming.minecraft\CustomSkinLoader
[2020-08-17 12:41:15] [Render thread INFO] Minecraft: 1.16.1(1.16.1-forge-32.0.108)
[2020-08-17 12:41:15] [Render thread INFO] Config File: C:\Users\HOST\AppData\Roaming.minecraft\CustomSkinLoader\CustomSkinLoader.json
[2020-08-17 12:41:15] [Render thread INFO] Try to load config.
[2020-08-17 12:41:15] [Render thread INFO] Successfully load config.
[2020-08-17 12:41:15] [Render thread INFO] version : 14.12
[2020-08-17 12:41:15] [Render thread INFO] enableDynamicSkull : true
[2020-08-17 12:41:15] [Render thread INFO] enableTransparentSkin : true
[2020-08-17 12:41:15] [Render thread INFO] ignoreHttpsCertificate : false
[2020-08-17 12:41:15] [Render thread INFO] forceLoadAllTextures : false
[2020-08-17 12:41:15] [Render thread INFO] enableCape : true
[2020-08-17 12:41:15] [Render thread INFO] threadPoolSize : 1
[2020-08-17 12:41:15] [Render thread INFO] cacheExpiry : 30
[2020-08-17 12:41:15] [Render thread INFO] enableUpdateSkull : false
[2020-08-17 12:41:15] [Render thread INFO] enableLocalProfileCache : false
[2020-08-17 12:41:15] [Render thread INFO] enableCacheAutoClean : false
[2020-08-17 12:41:15] [Render thread INFO] loadList : 7
[2020-08-17 12:43:44] [Jo INFO] Loading Jo's profile.
[2020-08-17 12:43:44] [Jo INFO] 1/7 Try to load profile from 'LocalSkin'.
[2020-08-17 12:43:45] [Jo INFO] Jo's profile loaded.
[2020-08-17 12:43:45] [Jo INFO] (SkinUrl: (LOCAL_LEGACY)add2343cdb205add97d109924dcbe0a0b331adcb,LocalSkin/skins/Jo.png , Model: auto , CapeUrl: (LOCAL_LEGACY)15d52ea40bff4b634872cf412c12edc113f88602,LocalSkin/capes/Jo.png , ElytraUrl: (LOCAL_LEGACY)6790449bb660e55a8dc3dbebb48b754d3c4d96ef,LocalSkin/elytras/Jo.png , Expiry: 1597661060)
[2020-08-17 12:43:45] [Render thread DEBUG] Loading type:SKIN
[2020-08-17 12:43:45] [Render thread DEBUG] Loading type:CAPE
[2020-08-17 12:43:45] [Render thread DEBUG] Loading type:ELYTRA

This?

I can't understand what you said... Could you please explain what is "cape skin" and what is "base skin"?

Have you installed any mod which may change your skin and cape?

Could you please provide us a full list of your installed mods? Just screenshots of your mods folder is OK, if the filename is the mod's name.

I figured it out... hehe-
sorry

That seems like your cape LocalSkin/capes/Jo.png has been loaded.

But it does not load in the actual game, when I hit reload cape in Optifine settings, it changes to the skin I want, but then back to the base one