Eagon not spawning

for me it doesn't work. completed about of 50 T16 maps without Maven/Exarch/Eater . Still no luck - didn't see Eagon .

Yeah I doubt support will help you with this kind of question. It is possible it is RNG, but that does sound unusual. As far as I know he stops spawning when he has a thread of missions going, uncertain on that though. Other than this just have the increases on the tree and smash though maps. Mods or quant may increase the chances, but i'm also not certain about that either. Going by how frequently I was encountering him in t16's, I would be very surprised if you did say 100 without getting him. If that's what is happening, It could be something like what people are suggesting, given it is a new mechanic, but there's always a chance that it is just a very long string of RNG. I've seen some other posts with people having trouble finding him. I don't know of anything preventing it though.

I also have trouble encountering Eagon. I believe I am now a week of play without seeing him.

Not saying there isnt a bug somewhere, it is a new mechanic after all. But ya'll need to brush up on your probability theory.

Saying you ran 10, 50, whatever maps, or saw a fix immediately after making a seemingly unrelated change, is not a sound basis for a conclusion.

Here is what is actually known:
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After completing the Threads of the Originator quest and defeating all three Incarnation pinnacle bosses for the first time, the mechanics of Memory Threads change slightly:

Memory Tears can be found randomly in any tier 1-16 non-unique map that can be found on the current Atlas of Worlds which when interacted with allows Eagon to create a Memory Thread leading to a random Incarnation. This appears to have a base chance of 5%.[1]

Certain Atlas passives can modify the chances for a specific Incarnation to be chosen. By default, a specific Incarnation has 33% chance to be chosen. By taking two reduction nodes, this can be increased to ~71%.

The Atlas small passive skill Memory Tear Chance can grant up to 40% increased chance to find memory tears in T16+ maps.

Source: https://www.poewiki.net/wiki/Memory_thread#Post-quest
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In the citation on the wiki, it states: Based on sample of 12/174 maps with 40% increased chance.

Anecdotally, I can say for certain that it is at least possible for eagon to spawn while running an eldritch influence, as I have had it happen multiple times.

It does seem reasonable that other influences would reduce/nullify Eagon spawn chances, since memories are associated to Originator-influence and you cant traditionally have 2 types of influence in a single map. However, since it is seen to be possible in this case, without a large sample size test of spawn rates with/without eldritch enabled.. we are just left to guess.