Hi Mykola,
You should probably post this as a discussion about the OfflineApps component, so that the component's team gets notified of your question.
That being said, I believe the OfflineApps component doesn't support variables in custom attributes.
Hi João,
Thanks for the hint - https://www.outsystems.com/forums/discussion/19517/offline-mode-renders-parameters-and-hidden-values-wrongly/