Yeah dialog boxes when sitting down have been annoying to me too. The compass and cookie teleporter are difficult to reach when sitting down too. These are the things the devs need to know to begin thinking if they should change things and how.
Maybe height of the chair is affecting this. Although the tool and belt do move according to height there does seem to be something weird when using items located on body like compass.
Yes, I do wish the dialogue boxes would all “reset” to HMD height in all cases so you can look up and it would then re-position up.
I also hope that they add an option to adjust the toolbelt on the chest so that you can better grab things while sitting down. This would alleviate those problems and compromise around chair/body differences for accessibility.