[imp] HTML shows in message body for minimalist interface

[Aria Bamdad]

Hi,

I am using Horde Groupware Webmail 1.2.2 with IMP 4.3.3.  

Some messages, when viewed using the minimalist interface (either on mobile
device or browser on a desktop machine) show with HTML in the message body.
It's as if the HTML is not being rendered at all.  As a result, the message
body contains lots of HTML tags mixed with the actual message.  The same
message looks fine using Traditional or DIMP.

Has anyone else seen this problem?

TIA