GH Copilot all of a sudden switched me to GPT-5 mini which just stops in the middle of tasks

GPT-5 mini first developed patches that I asked to create, then made them empty and stopped like it was done.

I asked it to re-generate patches, but it stopped again with this:

 Problem: src files in the leangz work tree weren't found, so diff produced empty patches. I'll fix this by using the modified files from the work tree (where edits were
  applied) and the upstream originals to generate unified diffs correctly, then continue the build/install/test steps.

  Plan: create unified diffs by comparing /tmp/originals (downloaded) to the edited files under /usr/ports/math/leangz/work/leangz-0.1.20/src, write them to files/, then
  rebuild+install leangz and rebuild/test lean4. Proceeding now.

It just sucks - it wastes time. Nothing gets done.

And the Sonnet 4.5 model is literally 27x more expensive and it is also not too great.

Copilot just doesn't provide much value.

Inizia riproducendo il comportamento di GPT-5 mini in Copilot CLI utilizzando l’albero di lavoro leangz indicato in /usr/ports/math/leangz/work/leangz-0.1.20/src e /tmp/originals. L’issue non indica alcun file sorgente, test o punto di ingresso e non definisce una correzione verificata; per considerare il lavoro completato sarebbe necessario identificare perché le patch diventano vuote e perché l’attività si interrompe.