Live Data issue: FlowRouter + Fast-render + Mantra architecture

Hi guys

I build a log aggregator for that ingest, aggregate and display logs in a web ui.
Everything works smoothly in development.

I ONLY face the following issue in my dockerize app [WebApp + Mongo DB instance] in the production environment.
When logging in production app, the loading icon is continously showned and I can see this in console logs:

Uncaught Error: Expected to find a document to change
    at Object.update (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:63:3438)
    at Object.o.(anonymous function) [as update] (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:55:42838)
    at http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:55:51034
    at Array.forEach (<anonymous>)
    at Function.A.each.A.forEach (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:1:854)
    at http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:55:51013
    at Function.A.each.A.forEach (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:1:998)
    at b._performWrites (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:55:50969)
    at b._flushBufferedWrites (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:55:50772)
    at b._livedata_data (http://localhost:5000/a4ba31848c4ec1e154f39bf68782ae8aa013acde.js?meteor_js_resource=true:55:50519)

I’m doing the subscription in container:

  ....

  if (Meteor.subscribe('queries.servers').ready()) {
    onData(null, { servers: Servers.find({}, sortServers).fetch(), filters });
  } else {
    onData(null, { filters });
  }

  ...

If I clean the db and logging in again the app, it works a expected.

While trying to debug that, I came accross theses issues
[https://github.com/kadirahq/fast-render/issues/9]
[https://github.com/kadirahq/fast-render/issues/12]

that was pointing that is might be linked to [meteorhacks:fast-render].
Since the package anymore maintained I succeed to find a fork of that package that was containing the fix for that issue [meteorspark:fast-render]
it’s mentioned in that issue: [https://github.com/kadirahq/fast-render/pull/191]

But even with that package the issue is still present.

Additional information:
Running on Meteor 1.5

Meteor package:

accounts-base                 1.3.1  A user account system
accounts-password             1.4.0  Password support for accounts
blaze-html-templates          1.1.2  Compile HTML templates into reactive UI with Meteor Blaze
dynamic-import                0.1.1  Runtime support for Meteor 1.5 dynamic import(...) syntax
ecmascript                    0.8.2  Compiler plugin that supports ES2015+ in all .js files
es5-shim                      4.6.15  Shims and polyfills to improve ECMAScript 5 support
jcbernack:reactive-aggregate  0.7.0  Reactively publish aggregations. **[ USE FOR LOG AGGREGATION IN PUBLICATIONS]**
jquery                        1.11.10  Manipulate the DOM using CSS selectors
kadira:flow-router            2.12.1  Carefully Designed Client Side Router for Meteor
meteor-base                   1.1.0  Packages that every Meteor app needs
meteorspark:fast-render       2.16.2  Render your app before the DDP connection even comes alive - magic?
mobile-experience             1.0.4  Packages for a great mobile user experience
mongo                         1.1.19* Adaptor for using MongoDB and Minimongo over DDP
reactive-var                  1.0.11  Reactive variable
service-configuration         1.0.11  Manage the configuration for third-party services
shell-server                  0.2.4  Server-side component of the `meteor shell` command.
standard-minifier-css         1.3.4  Standard css minifier used with Meteor apps by default.
standard-minifier-js          2.1.1  Standard javascript minifiers used with Meteor apps by default.
themeteorchef:bert            2.1.3  A client side, multi-style alerts system for Meteor.
tracker                       1.1.3  Dependency tracker to allow reactive callbacks