Still reproduces on T3 Code 0.1.7-nightly.20261103.4106 (desktop app, macOS 26.7.1), with Project grouping on and Project order set to Manual. In the source for that build (e1e520c93c), reorderProjects in apps/web/src/uiStateStore.ts still has no caller.
The workaround above no longer applies. #15990 was closed on 31 October, and the pinning that landed in #26154 states "No drag order for pins. Pins keep your project sort order." Pinning moves a project up to the pinned group, but the pinned projects are still ordered by the saved projectOrder that nothing can edit.
Before #21039 I kept a curated manual order across about a dozen projects. That order is now frozen. The only other choices are the two automatic sorts, which discard it.
Either a reorder control in the sidebar project filter or removing Manual from Settings would resolve the mismatch. Today the setting is offered but cannot be changed.