clickhouse-benchmark <<< "SELECT 1 FROM remote('127.0.0.{1,2}', numbers(99)) GROUP BY materialize(1) HAVING count() > 0 AND argMax(1, tuple(0))"

The crash is reproducing in version 20.1.
It does not reproduce in 20.3, 20.4 or master.

It also depends on experimental_use_processors setting:

19.14 - by default, experimental_use_processors = 0, the crash does not reproduce regardless to the setting value.
20.1 - by default, experimental_use_processors = 0, the crash is reproducing regardless to the setting value.
20.3 - by default, experimental_use_processors = 1, the crash is reproducing only if you change the setting to 0 manually.
20.4 - by default, experimental_use_processors = 1, the crash is reproducing only if you change the setting to 0 manually.
20.5 - by default, experimental_use_processors = 1, the setting is obsolete and does nothing, the crash does not reproduce.

It means that the bug is already fixed by enabling "processors" in 20.3 and by removing old code in 20.5. But we did not backport the fix.

Currently we have the following releases in support:

20.4 stable
20.3 lts
20.1 stable
19.14 lts

We have to find out the root cause and backport the fix to supported releases.