`heroku run python` gives error when connecting via tproxy

[halloleo]

I get an Heroku client internal error when running heroku run python. Here the error out put to the terminal:

Running `python` attached to terminal... up, run.7627
 !    Heroku client internal error.
 !    Search for help at: https://help.heroku.com
 !    Or report a bug at: https://github.com/heroku/heroku/issues/new

Error:       Connection timed out - connect(2) (Errno::ETIMEDOUT)
Backtrace:   /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/client/rendezvous.rb:40:in `initialize'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/client/rendezvous.rb:40:in `open'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/client/rendezvous.rb:40:in `block in start'
             /usr/lib/ruby/1.9.1/timeout.rb:68:in `timeout'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/client/rendezvous.rb:31:in `start'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/command/run.rb:132:in `rendezvous_session'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/command/run.rb:119:in `run_attached'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/command/run.rb:24:in `index'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/command.rb:206:in `run'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/lib/heroku/cli.rb:28:in `start'
             /usr/lib/ruby/gems/1.9.1/gems/heroku-2.39.1/bin/heroku:17:in `<top (required)>'
             /usr/bin/heroku:23:in `load'
             /usr/bin/heroku:23:in `<main>'

Command:     heroku run python
HTTP Proxy:  http://127.0.0.1:3128
HTTPS Proxy: http://127.0.0.1:3128
Version:     heroku-gem/2.39.1 (i386-cygwin) ruby/1.9.3

I use a local proxy on http://127.0.0.1:3128 to connect to the authenicated company proxy, but heroku doesn't seem to like this.

What can I do?

[leonardok]

Same thing here