LG Vertex screen lock broken

Question

My phone worked fine until the forced software update a month or so ago. 
Since the update the screen lock occasionally stops working.  This seems to be happening more frequently and now happens almost daily.  I can pick up my phone after a few hours and the screen is not locked.  When I check the account setting it looks like the phone should be locking itself.
Sometime when the screen lock fails it happens after I get an email.  (I get an email and then suddenly the phone is not locked anymore.)
One thing I noticed right after the software update is that when I push the on button and the phone is locked I get a very brief screen showing what was on the screen before it was locked and then the screen changes to the proper locked screen image.  This is very repeatable and is clearly something wrong with the software.
Another related symptom is that after the screen lock fails to kick in I also lose the "home" button.  When I push it nothing happens. 
 It is also disturbing that there is no place to look on your website to see why the software is being changed and what is being affected.  When you request more information on the phone all it tells you is that a software update is available and you need to download it before you can do anything else.
This is what I have now:  android 2.2.1, baseband version VS660MV6.6038.1001, kernel 2.6.32.9, build FRG83, SW version VS660ZV6.
I only use my phone for phone calls and the internet so I don't have a lot of stuff on the phone and have not added any new apps since before the software update.
Please help me fix this.  Thank you

Answer 1

This is happening to my Vortex, also.  Seems to happen at the same time each day (late morning) and appears to be correlated to my daily scheduled Backup Assistant timing.  Next time I use an app or something, the screen seems to lock as usual.  Haven't figured out the problem and can't help with your other questions.
I don't know whether this is related, but since this has been happening, I also notice that I have not been able to power down my phone without first unlocking the screen.
jeff949 wrote:
My phone worked fine until the forced software update a month or so ago. 
Since the update the screen lock occasionally stops working.  This seems to be happening more frequently and now happens almost daily.  I can pick up my phone after a few hours and the screen is not locked.  When I check the account setting it looks like the phone should be locking itself.
Sometime when the screen lock fails it happens after I get an email.  (I get an email and then suddenly the phone is not locked anymore.)
One thing I noticed right after the software update is that when I push the on button and the phone is locked I get a very brief screen showing what was on the screen before it was locked and then the screen changes to the proper locked screen image.  This is very repeatable and is clearly something wrong with the software.
Another related symptom is that after the screen lock fails to kick in I also lose the "home" button.  When I push it nothing happens. 
 It is also disturbing that there is no place to look on your website to see why the software is being changed and what is being affected.  When you request more information on the phone all it tells you is that a software update is available and you need to download it before you can do anything else.
This is what I have now:  android 2.2.1, baseband version VS660MV6.6038.1001, kernel 2.6.32.9, build FRG83, SW version VS660ZV6.
I only use my phone for phone calls and the internet so I don't have a lot of stuff on the phone and have not added any new apps since before the software update.
Please help me fix this.  Thank you