If you haven't already, please definitley send us a feedback report then. This does not seem to be a known current issue, so a report with your logs will be very helpful for us in order to troubleshoot the cause behind this.
Also, does this persist in every project of yours, or maybe just a select scene? Are your graphics card drivers fully up to date?
Hi Demian/ I just have sent feedback. My drivers is up to date fully, model is not so big (35Mb). If I open model larger freez is longer(((( If I close enscape freez is gone.