Hello,
Not particular to this beta but in Gutenberg, the used CSS is not totally reflected into Gutenberg, which can be misleading, for exemple, for a client creating a post having not the right display in front of him. Additional remarks too
- Not sure if proper display by default but post canvas take the full width
- Hard/impossible to add on the canvas a new block between existing block, need to add a block at the end and move it through the left panel
- Some CSS from components missing, however properly reflected on frontend (like title size, ol/ul marks,…)
(using meta box CPT / browser is Chrome on MacOS M1 26.1)

