You can address this via the vimrc support plugin and a custom js function to handle up/down nav.
The solution is described here:
You’ll need to (also described in that plugin’s readme)
- install vimrc plugin
- enable js function support (plugin settings page)
- add the JS functions file to your vault and include the functions I added in the pull req
- add the corresponding vim mappings to your .obsidian.vimrc