Mysql on Ubuntu (VMware) + MySQLdb (python), intermittent?

Question

MySQL

I installed Ubuntu mysql on a virtual machine, forwarded port 3306, started a user for remote connection. I'm trying to connect to the database from the host Windows using the Mysqldb - Python module. The connection goes through, I can make requests, etc. But if I disconnect from the database (cursor.close(), db.close() or without it), then when I reconnect, the module can (and most often does) give an error:
"Lost connection to MySQL server at 'waiting for initial communication packet', system error: 0"
At the same time, if you try to connect via telnet / ncat, nothing happens either (it just hangs until it
falls off on its own) I look into the database - the connections are empty (only the console through which I can look), in aborted connections are zero too.
If you wait a certain time (always different!) Then everything works ... It infuriates a little and slows down development ... What tell me??
PS Firewalls are disabled on both Ubuntu and Windows