Photon l Gridlock on Images

Hello,
The JetPack plugin editor told me I need to manage with .htaccess with the issue I have with images processed by one their plugin : Photon.

Actually ; somes images managed by their photon Plugin are not correctly displayed on webiste, because UAM seems to break the link provided from their CDN.

Could you tell me how I could fix with or even without .Htacess edit ?

Thanks

Denis