#2 works. Thanks j-barnes!
It's not relevant issue anymore.
The problem was on Redis side.
It works on my side.
Roky, yes. You can use this solution.
https://www.drupal.org/forum/support/module-development-and-code-questio... →
BUT
It's not the best approach. Read please this discussion
https://www.drupal.org/project/redis/issues/2765895
🐛
Currently Drush Cr or Cache Clear UI does not flush Redis cache
Fixed
After clearing the cache on Drupal It marks cache in Redis as invalid. It doesn't decrease memory.
If you want to flush DB use this module https://git.drupalcode.org/sandbox/mstills-2888621
Solution is: updating to 2.0 version