Open any match (https://terminal.c1games.com/watch/97099) from about 97047 (/watch/{number}
) and you will see both sides crashing, which results in giant ELO inaccuracies because the algos are not supposed to crash.
This affects hundreds of matches.
I suppose that this has been resolved about a thousand matches later. 97k to 98k will give you a good idea of what was going on.