Why aren't the index files in manticoresearch updated when I run the indexer --rotate --all command?

Question

Sphinx

I'm using Manticoresearch 3.4.2 in a docker container.
The container is launched via docker-compose.
In the settings of the searchd block, the parameter seamless_rotate = 1.
If I stop the searchd service and run indexer --all. Everything is working.
If I don't stop searchd and run indexer --rotate --all, then the index files in the /var/lib/manticore/data folder are prefixed with new at the end of the file.
Those. for example, there is a products index, then when reindexing, without stopping searchd, the updated files of this index become products.new.