editor messes with text input

The editor in Discussions messes with text input. Using default AOSP keyboard and AnySoftKeyboard, the space added with/after spell-checked word gets deleted, the space has to be added again manually. I assume that the space is deleted by the SF editor and not by the device keyboard, because i have tested two keyboards and the glitch hasn’t appeared anywhere else so far. Additionally with AOSP keyboard, the whole text is duplicated on adding Space. Can anybody else reproduce this behavior, please?