eM Client is slow in refreshing e-mail boxes (yellow-black animated line appears at the top of the message window)

Hi there,

I have a quick inquiry regarding the speed of syncing/refreshing mailboxes. I utilize four accounts, and occasionally it takes 10-20 seconds before the content of an email box becomes visible after switching accounts. During this time, I notice a yellow/black animated line at the top of the message window. Is this normal? Could you assist me with resolving this issue, or is it something I’ll have to accept? I appreciate your prompt response.

Best regards,
Radek