Ionic Pro: Job failed: execution took longer than 900 seconds

When i push to ionic master on Ionic Pro, the build crash with “Job failed: execution took longer than 900 seconds”, altought all seems to be ok. I can notice the webpack operation is very long since i’d install latest versions of @ionic/app-scripts and ionic-angular :

...
[13:50:55]  ngc finished in 16.32 s 
[13:50:55]  preprocess started ... 
[13:50:55]  copy finished in 17.03 s 
[13:50:55]  preprocess finished in 128 ms 
[13:50:55]  webpack started ... 
Webpack process.env.IONIC_ENV :  prod
[14:08:54]  webpack finished in 1078.45 s 
[14:08:54]  uglifyjs started ... 
[14:08:54]  sass started ... 
[14:08:59]  sass finished in 5.46 s 
[14:08:59]  cleancss started ... 
[14:09:32]  cleancss finished in 32.99 s 
[14:13:01]  uglifyjs finished in 247.76 s 
[14:13:01]  postprocess started ... 
[14:13:02]  postprocess finished in 379 ms 
[14:13:02]  lint started ... 
[14:13:02]  build prod finished in 1343.76 s 
[14:13:07]  lint finished in 4.89 s 
npm info lifecycle edmobile@0.1.6~postbuild: edmobile@0.1.6
npm info ok 
npm run build succeeded
Uploading build...
Uploaded build successfully.
Running after script...
$ clean-up
Cleaning up files...
Successful clean up
ERROR: Job failed: execution took longer than 900 seconds

My config (ionic info):

cli packages: (/home/brun/.nvm/versions/node/v6.11.0/lib/node_modules)

    @ionic/cli-utils  : 1.12.0
    ionic (Ionic CLI) : 3.12.0

global packages:

    cordova (Cordova CLI) : 7.0.1 
    Gulp CLI              : CLI version 3.9.1 Local version 3.9.1

local packages:

    @ionic/app-scripts : 3.0.0
    Cordova Platforms  : android 6.3.0 ios 4.5.1
    Ionic Framework    : ionic-angular 3.7.1

System:

    Android SDK Tools : 25.2.5
    Node              : v6.11.0
    npm               : 4.6.1 
    OS                : Linux 4.4

Misc:

    backend : pro

Do you have any idea ?

Ionic Pro is a hosted and closed source service, so there is not much we, the community, can help you with, sorry. Check these:

You can - and should - contact support at http://ionicframework.com/support#support

ok,
thanks for your response