Inbox update if new email is received

Hi. I am dealing with the problem that the inbox doesn’t update the email list when a new email arrives. It keeps showing the “last newest” email on top of the inbox list and I have to manually scroll up to see the new email or click the inbox again to show it. The behaviour is the same with all inbox or other sub folders, it never updates and shows the new email.
Couldn’t find a setting for that or another error bug in this forum. Is there a way to solve this or am I the only one with this problem?

Thanks in advance.