Everyone else on your other thread did a good job of explaining the situation, but I'll take another run at it:
Channels DVR Server did not start using more RAM with the update. That little sliver of yellow is the amount of memory used by Channels:
In this latest stable release, we improved the visualization for the RAM, and we also decided (partially to answer questions like "Why Is Channels Using So Much RAM?") to add an additional piece of information to the status. Namely, how much of the used RAM actually is the DVR Server and the processes it spawns (like ffmpeg and comskip).
As someone who has supported large systems, I'm sure you understand the importance of historical metrics to be able to make accurate assessments regarding the cause of observed changes to operational systems. To do that, it would require having per-process memory usage over the past month to see what the average process usage is of everything on your system. Unfortunately, it doesn't sound like you have that available.
Eyeballing your graph, the little yellow sliver on the left (which is the memory used by the DVR Server) does not appear to be anywhere near 14%, so we can rule out Channels as being the source of that increase in memory.
Edit: I noticed that you did submit diagnostics in the middle of December and looking at that diagnostic submission, it appears your total memory usage at that time was 60%, so it looks like we’re talking about a 2% change in your over-all memory usage on this system between then and now.
On my 16GB M1 Mac Mini, my DVR Server is reporting that it is using 2% of available RAM:
Have you opened Activity Monitor and sorted by Memory and seen if there's anything new that jumps out at you on the top of the list?