I have similar problems on Zgemma H7s
OpenPLi installed in flesh. Clean OpenPLi, no list, emulator, plugins. Setting the network parameters has passed easily (when OpenPLi is in multiboot, it's very difficult to set up the network. I have to try to enter the setup options several times.). However, when I tried to connect with the feed, it took a very, very long time. The process of emulator installation and plugins is just for the story. Installing serviceapp lasted between 5 and 10 minutes.
Then I reset my router, and when I tried to install something with feed, there was no slowdown anymore.
With every new OpenPLi installation, whether in flesh or in multiboot, the same problems are repeated.