RE: Qahal Ekklesia Church

Perhaps, but it doesn't seem the writers of the New Testament had any problem with the substitution. The 3rd and 4th century 3 more than less complete Christian Bibles' Old Testament (which is the Greek Old Testament) also use the substitution words. As do the 1st century and 2nd century early Christian writers' works. The deception (which it does very much seem to be) was accepted tradition well entrenched in even ancienter times than those.

The Septuagint Jeremiah 20:9
Then I said, I will by no means name the name of the Lord

Masoretic Text Jeremiah 20:9
Then I said, I will not make mention of him
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The Septuagint Esaias 33:21
for the name of the Lord is great to you: you shall have a place …

Masoretic Text Isaiah 33:21
But there the Glorious LORD will be to us a place
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The Septuagint Psalm 40:4,5
Blessed [is] the man whose hope is in the name of the Lord,

Masoretic Text Psalm 40:4,5
Blessed is that man that makes the LORD his trust
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The Septuagint Jeremiah 23:27 as their fathers forgot my name in the worship of Baal.

Masoretic Text Jeremiah 23:27 as their fathers have forgotten my name for Baal.

Perhaps that is one of the reasons also for the cover-up. Kind of similarly something happened: At one point, the Book of the Law was lost for many decades and forgotten until found in the wall and brought to King Josiah.

Add the knowledge of Jeremiah 23:27 above to that the Chaldean / current Hebrew alphabet which is considered all consonants and Hebrew as a language was almost extinct by the time the rabbis / scribes named the Masoretes invented the vowel system of dots and squiggles AD 6-9th century in order to had to guess at a lot of the vowels when standardizing the falsified and mutilated Hebrew text and had to guess at some vowels as how they were as they fixed the vowels in place. The Being said He is, ("I am.") Similarly, Lord Yahshua also said "I am" many times. Esaiah also said the name "I Am" :

The Septuagint Esaias 65:1, 2
I became manifest to them that asked not for me; I was found of them that sought me not; I said, I am to a nation who called not on my name: I have stretched forth my hands all day to a disobedient and gain-saying people, to them that walked in a way that was not good.

Romans 10:20
but Esaias is very bold, and says, I was found of them that sought me not: I was made manifest to them that asked not after me, But to Israel he says, All day long I have stretched forth my hands to a disobedient and gain-saying people.

Masoretic Text Isaiah 65:1, 2
I am sought of them that asked not for me; was found of them that sought me not, I said, Behold me, behold me, to a nation that was not called by my name: I have stretched forth my hands all day to a rebellious people, which walked in a way that was not good, but after their own thoughts.

"I Am" is different somewhat from YHWH. I don't have the answer nor does any man or woman. I would like to, but i am content to just to strive love Him as best as I can knowing He is merciful, compassionate, good, and righteous.