A rendering issue in t30dpy3 specific to the pi using the trixie x11 hardware driver and alpha blending is fixed, as is opening the window centered under x11 using SDL3.
However, now tracking down what appears to be a bug in the trixie x11 backend itself, possibly already known. After running for some long number of hours, 12 or so plus, the x11 hardware driver dies. If confirmed, not something I can fix. Like I've been saying, trixie is definitely not ready for prime time.
Bill