The Eastern Orthodox Church maintained its line of Apostolic Succession by carefully preserving the proper rites of consecration of its bishops and priests. Only validly ordained clergy can validly consecrate the Eucharist.
Anglicans and Lutherans did not.
THIS is a hindrance because despite your belief or that of your pastor who says the words, nothing happens to the bread or wine.
No consubstantiation. No transubstantiation. Nothing.
It is mere bread and mere wine. He is not there.
I must admit that I am confused…
It seems to me that your reasoning is circular:
Holy Communion at a Lutheran service is mere bread and wine because the pastor isn’t “properly consecrated”, and the pastor isn’t properly consecrated because…he isn’t…
What exactly is the reason why you believe that Lutheran and Anglican bishops are not properly consecrated, and I’m afraid you didn’t really answered my question, as to why this is important for the precense of Christ, but only repeated yourself.
Even if we ASSUME for the moment that you’re correct (which I’m not prepared to agree to) in claiming that Lutheran pastors are not “properly” ordained; why would this be a hindrance?
The WORD is the focus of the consecration of the bread and the wine.
Until our Lord uttered the following words: “This is my body … this is my blood”, the elements were only bread and wine. They became something else by the word of God.
Likewise in the service: It is not the pastor himself that causes the bread and wine to become the body and blood of our Lord; it is the words - the very same words that Christ used at the Last Supper.
Furthermore: What is the basis on which to reject the ordination of Lutheran bishops and pastors?
And please don’t say “The Catholic church says so” - because that would again be circular reasoning

:
“Lutheran pastors are not properly consecrated because the Church says so, and the Church says so, because they’re not properly consecrated”
In addition: Imagine the following scenario:
A group of believers strand on a desert island without hope of rescue. And there is no priest/pastor among them. As they die of starvation and thirst, they utter the wish of recieving Holy Communion. The make-shift leader of the stranded victims does the following:
By some amazing “luck” someone managed to bring a bottle of wine and a loaf of bread.
The leader then takes the bread and wine, consecrates it using the same words Christ did, distributes it to all of the others, and finishes off by drinking the rest of the wine and eating the rest of the bread, after which they all die more or less slowly
(NB: This was not meant to be a realistic scenario, but for the purpose of illustrating a point

)
Did the leader of the group act correctly?
My answer to this question (but I don’t know about the official position of the Lutheran church on this) is yes.
All Christians are called to be priests and kings to God, and the pastor is merely the “primus inter pares”, first among equals.
I have propably a lot more to say on this, but I’m too tired to focus…properly
Mark