Flickering mail preview in v8 update

Hi all. I installed em client 8 beta and everything worked fine. Now I installed the update (8.0.2597) and since that I cannot read mails in preview pane. The preview only flickers and does not show any mails. Changing the theme helps for few moment until I click on another mail. How can I get this fixed?
Thx and rgdfs

Is this maybe the same as, or similar to what @SethT is describing in his post at Email Viewer repeatedly refreshing?

I guess there are some issues with the Mac beta that make it unusable. You can send your feedback to testing@emclient.com and they will look into it.

@Gary: Ok, I will follow your suggestion.Thank you