Copied activity remains associated with original project

Yes. I did not do anything else yesterday.

What it should be? Also it creates the records but assigns wrong projects. Does it assign project id after server confirms that record created??

Here is what I got from my hosting support:

MySQL connect timeout value is set to 10.
If you see error message 'MySQL server has gone away', it might be that your script is not optimized and makes too many connections to the database (or your website is very active, has many users online at the same time).
You may also get this error if your script executes heavy/slow MySQL queries.
First of all you should check if your database is well optimized and has indexes where needed. You should contact the script developers and ask assistance.