But do not the majority of Lutherans believe it is only a temporary presence, and perhaps receptionism?
:bigyikes: I would hope not! As others have said, if you find a Lutheran teaching this, please correct them and turn them toward their own Confessions!
I get that idea based on two facts.
Well, let’s take a looksee.
Lutherans do not reserve the Sacrament for the ill and those not present at the time.
This is not quite accurate. Lutherans
typically do not reserve the Sacrament (some -perhaps many- do).
Lutherans who do not practice reservation of the Sacrament do not refrain from doing so because of any particular doctrine against it, but because they take very seriously Christ’s command to “Take, eat. Take, drink.” Christ doesn’t say anything about “Take, eat some now, and save some for later,” so in typical Lutheran fashion, they don’t put a comma where they understand God to have put a period. Instead, they simply avoid having any leftover altogether. Churches I’ve worshiped at have a simple practice - the elders count how many members are present so no more bread or wine than necessary is consecrated.
If a member is in the hospital or otherwise unable to make it to Divine Service, the pastor typically visits and consecrates the elements on-site, both so as not to subject His Body and Blood to being rather unceremoniously carted around all day as they visit shut-ins (and potentially spilled or dropped!

), and so that the consecration takes place in the presence of the communicant. This is thought to be more in line with Christ’s command, not to mention more pastoral (who doesn’t like a one-on-one visit from their pastor?

).
In short, the traditional Lutheran practice of not reserving the Sacrament is done totally out of reverence for His Body and Blood.
Lutherans will after the Communion service will put consecrated hosts back in the box with unconsecrated hosts. And the blood/wine either goes down the drain into the sewer or back in the bottle.
If I ever met such a person who claimed to be Lutheran, we would have words.
At churches where I’ve worshiped, any remaining Blood in the chalice is either consumed by the pastor or properly disposed, and anything remaining of His Body is either stored separately from the unconsecrated hosts or properly disposed. I know when my father’s congregation (he’s an LCMS pastor) was building a new church a few years ago, members made a particular point to add a piscina, which had been lacking from the original church (a terrible oversight of that hideous 1980’s bunker-church construction!

).
I typically steer clear of Wikis, but this actually explains Lutheran thought fairly well (be sure to read the footnotes, as well):
lutheranwiki.org/How_Long_are_Christ%E2%80%99s_Body_and_Blood_Present_in_the_Consecrated_Bread_and_the_Wine_of_Communion%3F