PHP 8.2.8 + Memcached as session handler

I installed Memcached via pecl. Add extension in php.ini (FPM folder). I see Memcached section in phpinfo() output. Changed session.save_handler → Memcached and session.save_path →

Now i have problem with session_start():
session_start(): Failed to write session lock: SERVER HAS FAILED AND IS DISABLED UNTIL TIMED RETRY
session_start(): Unable to clear session lock record
session_start(): Failed to read session data: Memcached

What problem with Memcached?
P/S. I tried to save data and fetchAll from Memcached and all works as expected. Why session won’t work?