Live and DVR when you use VAST


We are using the last player version 2.57 in the SaaS Kaltura account. We have a behaviour too strange with the LIVE. We have configured a VAST ad campaing and when the Amazon ad is played the DVR function after the ad is not enable. If we disable VAST, ok the player has the DVR funcionality, and with other ads, the DVR function still run in the player.

I attach an example:

Some idea?