With many other e-mail apps like Gmail & Outlook it is possible to quickly find e-mails from a sender.
By clicking on the name of the sender, right click and then choose “E-mails from sender” it will show all the e-mails from that sender with the e-mail address used.
Now if I want to find a sender I have to go to the search bar and type its details manually.
I wanted to use this feature to delete e-mails from a specific person and then I encounter this.
If I am working in that right side-bar contact section and I start deleting e-mails from that person and the message I am deleting is the same as the one selected from the inbox section, the contact section view is changed with the next contact from the inbox.
So then I have to find another e-mail from that person again (search bar) to keep removing e-mails from that person.
Go to the Contacts section of eM Client, and click on the contact (1). If you are in the People view (2) you will have a History tab (3) available. In that tab you will have all the messages (4) from and to that contact. You can browse through them and delete whatever you want without changing to another contact.