Apologies for the late reply. I didn't spot anything unusual in the logs—aside from the tuner fetching EPG data and you connecting via Kodi.
However, looking back, something does stand out to me i didnt realized before: You were running Proxmox as your virtualization platform, and within that, an LXC container that hosts Docker—essentially adding another layer of virtualization. It is, in a sense, virtualization within virtualization. That isn't really the recommended way to approach this setup.
While it is technically possible to run TVHeadend by passing the TV tuner card directly from the Proxmox host through to the LXC container, the more robust approach is to set up a dedicated VM specifically for this purpose.
My primary Instance runs on a dedicated bare-metal machine equipped with a TV tuner card (acting as an HTPC), while my secondary TVHeadend test Instance runs within a PVE VM—albeit without a physical tuner card, configured solely for IPTV.
The path you ultimately chose—utilizing a dedicated VM for this task—is almost certainly the correct (and superior) approach.
It also appears that your issues have now become a thing of the past. So Far so Good.
