Using "Show Conversations" on large threads stalls emClient

Hello,

I love this product and it got better over the years but one thing that remains an irritant
is the fact that it becomes very very slow when clicking on the subject line of a thread
that contains many replies. I often have threads with 20-60 replies and it takes a minute
for them to open in the details section. While this is happening, the interface doesnt
respond correctly.

I chose this product because it is able to group e-mails by Conversations but this feature
makes it awefully slow. As a comparative, Outlook doesn’t have this issue.

Accounts are all IMAP and the issue arises as soon as the threads reaches 20 or 30 replies.
Internet connection is 100mbps and there is plenty of RAM.

Thanks for any hints