Maybe the problem drivers.
Install VTI with the latest drivers and check.
Thanks a lot for the suggestion. :-)
I flashed the box with VTI v7 and updated the image with the latest patches.
There was no "Preferred tuner for recording" so I'll have to assume that it's the same behaviour as in old OpenPLi 2.4 images.
However, I got the same issue with tuner selection in VTI, which indicates that the "Preferred Tuner" Auto function is broken for my setup.
That would be extremely strange as my setup is as simple as it gets for multiple tuners, and it's been non working at least since late march.
I've double and triple checked with clean flashes, and there's only one conclusion: OpenPLi 2.4 works ok but everything else fails miserably.
Basically, it seems there must've been a change in the Auto feature implementation at some point in the core image that affects all releases
that are built upon that code.
The question now is: can it be fixed and where to report the issue? Or is it possible to rip out the Auto function code from version 2.4 and
replace the current code? I have no idea if the code is isolated enough to "transfer" to newer builds, but I'd sure love to try if it's possible.