Just updated with last cutting edge version. Stacked diacritic components that were working great with automatic aligment had to have disabled alignment when re-opening the file, and are now doing very weird stuff; jumping up and down or sideways with the zoom, not attaching to the diacritic top anchor etc.
Temporarily linking a video screen of the issue here: 3237_bug.mov - Google Drive
I have the same issue. Everything using components and anchors is borked completely. This new build of Glyphs introduced a bug that does this.
Thanks for the report. I fixed it.