Social Meta og:description

Hi guys, 
right now I made thet on last 3.9.28, not yet on J4
I'm trying to understand how Open Graph run / should run in theory and in your opinion about og:description.
So, as far as I see by using the main Facebook Debugger tool:

A - Open Graph plugins off
- Joomla Article with Description Content and Meta Descriptions fields filed + I create an Article menu itenu and I add the Meta Description menu item = Debugger is not able to show any Description into preview, but it mark the og:description with the Article Meta Description (not the Meta Description of its menu item)
- if I cancel the Article Meta Description = Debugger is not able to show any Description into preview, but it mark the og:description with the Meta Description of its menu item
- if I cancel also the Article Menu Item Meta Description = Debugger is showing Content Description into preview and it marks the og:description with the Content Description

As far as I know, the right priority ladder should be:
1 - Article Menu Item Meta Description
2 - if not, Article Meta Description
3 - if not, Article Description Content
Please, as far as you know / your experience, What do you think about ?
Is the 1 / 2 "issue" Debugger reading order anything that can be corrected on Joomla code ?

B - Open Graph plugins on (without to create any specific menu JFBC Objects)
Debugger does not care of the Article Meta Descriptions fields and / or the Article Menu Item Meta Descriptions = Debugger is always showing Content Description into preview and it marks the og:description with the Content Description
From my point of view the priority ladder, as I reported above, should be maintained. 
Please, What do you think about ? The Meta Description should be more coherent for that than the Description... no ?!? What is your experiene on it ?
What should be the standard / default behaviour ?

Hi Alex, 
as always, many thanks for your explications, so:

A - Open Graph plugins off
I will re test it when Joomla 4 ill be released and, in case, I will report it as "issue" (I know they are working hard on 3.9.10 > 4 issues) 

B - Open Graph plugins on
I can have the plugins enabled ust for other reasons, so (nothing urgent but following the logic) by default they should work / follow / maintain the same "priority ladder" without forcing me to configure new Social Meta Objects for the articles / categories to return to the default Joomla behavior