I heard about Hubble tension problem for the first time a few days ago. This is supposedly a big unsolved problem in modern cosmology.
Here is what a recent review paper says in a top journal about the Hubble tension:
"a serious desperate crisis in cosmology"
In short using the full distance ladder of standardized cosmic candles, often supernova 1as one get Hubble constants of about 73 \pm 1.
When using only very low z supernovas or non distance ladder methods such as CMB or gravitaional waves one gets number roughly 68 \pm1
Two very reliable methods with lots of good observations give very different answers.
Since incorporating Lorentz relativistic mass gets rid of dark energy, I though few days ago perhaps related to Hubble tension also. I did the calculations last night and were running it on one of largest supernova 1a databases, and at first run I got that Hubble constant is over estimated by about 4.19 when ignoring Lorentz relativistic mass. Also I get hardly any correction when only using all supernovas with z<0.05, which also is perfectly in line with findings.
The HUBBLE TENSION IS GONE! The physics community just ignored Lorentz relativistic mass without ever investigating what it lead to.
Very dirty draft I just put out
The Hubble tension is solved!
When I get this published it will strongly improve my bet odds against Alan!!