LMMS Stays Running In Background After Program Has Been Closed

Windows7 64Bit
LMMS 1.3.0 Alpha 64Bit

Okay lets try this forum out again, we will start out first with some bugs....

After closing LMMS the program stays running in the background which you can see in the Task Manager.
Depending on speed of computer most may not notice this.
I first noticed this when testing LMMS on a weaker computer and experienced that after closing LMMS all of a sudden the computer would lose complete functionality (slow, pauses, gltiches, etc.)
These glitches would go away right after manually closing LMMS task in the Task Manager.

I then tested on a slightly faster machine and same issue it stays open, but computer runs ok after.
CPU seems to jump up 20-30% gain after program is closed.
Sometimes it stays running in background for a while, but I have also noticed that in some cases it will only stay running in for about 30 seconds to a 1 minute and then closes on its own.

It appears that LMMS may be experiencing a little bit of separation anxiety, which I can fully understand.
If I am to be honest after closing out LMMS there is a part of me that doesn't quite want to fully let go either....

Edit:
Only occurs for me when using LMMS 1.3.0 Alpha 64Bit
This does not happen when I use 1.2.2 version

Reproduce the report on Windows 7 64-bit with LMMS 1.3.0 Alpha 64-bit, then compare its shutdown behavior with LMMS 1.2.2. Confirm that closing LMMS ends the process promptly and that CPU usage returns to normal without manual termination.

Written by the indexing model from the issue text.