fix: change_headers_on_each_requestをfalseに修正

config/initializers/devise_token_auth.rb

@@ -5,7 +5,7 @@
   # client is responsible for keeping track of the changing tokens. Change
   # this to false to prevent the Authorization header from changing after
   # each request.
-  config.change_headers_on_each_request = true
+  config.change_headers_on_each_request = false
 
   # By default, users will need to re-authenticate after 2 weeks. This setting
   # determines how long tokens will remain valid after they are issued.