@box464 @mayel thanks, took the occasion to do a proper refactor of the composer, took a while but worth it! I've included a new option in setting preferences to switch between a non-blocking composer layout to a focused one (prob naming create confusions, the non-blocking is the default one, that let you navigate the feeds and pages while composing your post, while the focused layout opens the composer in a modal, so that the user has a distraction-free view to focus on the post)
I've tested the 2 options and fixed the responsive with CW open and closed and with virtual keyboard turned on / off. A bit more testing for the different browsers, here a video: loom.com/share/3dc5420240e74...