Rails assets fingerprints differ on server

(I’ve already tried enter link description here)

I’m using a docker image with Ruby 2.2.2p95 and Rails 4.2.3 to run 2 containers on 2 different servers, but although I use the same image, they both serve desktop.js with different fingerprint:

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  • When I run

    rake assets:precompile 
    

    on both machines, they both generate the js files with the same fingerprint –

    desktop-<FINGRPRINT>.js
    

    However, when I access the my homepage, one of the servers serves a different desktop-<OTHER-FINGERPRINT>.js

    How can it be? Is there some caching mechanism I’m unaware of? I tried taking the server off and on again, but the same problem persists, and with the exact same desktop-<OTHER-FINGERPRINT>.js

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