Sudden silnece during playback issue

Hello everyone,

I have a problem. Since yesterday Audition is acting weird. While playback of my recording, about every 30/40 seconds trackt mute for a second. I have a proper output in preferences. There are no changes on volume envelope. The bigest problem however is that seconds od silence are kept in exported file. Please help, I want to get rid of that issue.

Best Regards