I have Glyphs version 3.0.3. Since I recently upgraded Show Stems and Recyclers plugins ('though I’m not making any cause/effect link here), I’m experiencing problems with composite glyphs: (a) composite glyphs no longer display in the preview panel; and (b) automatic alignment does not work for most composites.
Automatic alignment is not disabled; after applying changes in the original glyphs I right-click apply automatic alignment to the composites, but LSB & RSB values in the Glyph Info panel will no longer switch to grey. Let me say I never had these problems before, working on the same files. See screenshot attached.