Dolphin app: speed dial icons

[NY]

Here's a weird one: I'm setting up Dolphin V11.5.16 on a new Samsung S7
(Android 6.0.1) phone. I've bookmarked a few pages that I visit frequently
and added them to the Speed Dials.

Two of the pages that I visit are my security cameras, which are identified
by IP address (only valid within the house!). The site that the cameras
provide (they each have a built in web server) does not have a favicon (icon
that displays in the name-stripe of the browser) so I'd expect Dolphin to
use a generic "globe and latitude/longitude lines" icon. It does for one
camera, but for the other it is substituting the icon for another unrelated
site that I've got bookmarked, which is a bit confusing.

It's always the same icon that it's substituting, and it makes no difference
whether I remove the speed dial for the real site that uses that icon. I've
cleared the cache (Dolphin icon, Clear Data, Browsing History / Cache and
site data / Cookies) and rebooted the phone.

https://s32.postimg.org/8ysqn5vmd/Img_0455_small.jpg is a photo of the
Dolphin Speed Dial screen.

The icon outlined in red is one of the two cameras which has a generic "no
favicon" icon. The one outlined in green is the other - in this case,
Dolphin has substituted the icon for another site, IMDB. No icon is
displayed when the page is open; it's only when the speed dial shortcut is
created that the icon is substituted.

I created both shortcuts in the same way, by navigating to its URL (actually
its
IP address) and then pressing Dolphin, Add To, Speed Dials - I also changed
the shortcut name from the default that the camera provided.

Anyone got any suggestions? It's extremely trivial but it's annoying me :-)