I had created a project in PD-11 rendered an MP4. No problem playing on my Sony TV.

I opened the same project in PD-12 and rendered as MPEG-2 which does not play on my TV. I had posted about this in another thread. Rendering as MP4 plays however.

Yesterday I created a fresh 5 min project in PD-12 which was rendered as WMV and MPEG-2 which plays on my TV with default rendering parameters ie., 1980x1080m,50p,25 mbps (MPEG-2). My project has a mix of MP4 shot from my cell phone at 17 Mbps and from my Sony HX-300, (25 Mbps 50p), with titles at the beginning and at the end. 2 transitions were added to simulate the project created on PD-11
The file created on PD-11 was about 54 min. I used same clips as used in PD-11

Now the question

Why does the PDS created on PD-12 rendered as MPEG-2 or WMV plays on my TV while the one created on PD-11 does not.

AVCHD does not play in both cases and I am trying different bit rates PC specs :
OS Windows 10.0 Pro
MB - AS rock Z77 extreme 11
Intel 3770K @ 4.0 Ghz OC
Gskill 32 GB RAM 1800 Mhz
6 TB HDD, SSD bootable
nVidia ASUS GTX 660 Ti
BenQ 22" LCD monitor 1920x1080