Crash when routing channel with NDI consumer

[AndrewFields08]

Observed Behavior

the gpu memory fills up in a few seconds and leads to the server crash.

config:
caspar.txt

Expected behaviour

Split the first big channel into the other three with no crash

Steps to reproduce

1. Start CasparCG

2. run:

• PLAY 2-10 route://1
• PLAY 3-10 route://1
• PLAY 4-10 route://1
• MIXER 2-10 FILL 0 0 3 1
• MIXER 3-10 FILL -1 0 3 1
  -MIXER 4-10 FILL -2 0 3 1

3. PLAY 1-10 VIDEO_FILE

Environment

• Commit: 5e29af9
• Server version: 2.4.1
• Operating system: Windows 10
• NDI 6.0.1.0
• 2 x Xeon E5-2640 v4
• 32GB Ram
• Quadro M4000 driver 472.98

[BCordleRossVideo]

I also experience this bug in 2.4.2. Running 2 channels happily with decklink inputs and ndi sources as overlays, but once I add an NDI consumer, the memory usage climbs up steadily over a period of 3-4 minutes until it fills up and locks the system up.