Hunger is severely more aggressive when playing offline/natively rendered. I know it is, as I can move a decent distance before needing to eat, when playing on a server. I don't know if the game is over counting movement distance when rendering natively on my Laptop, or adding additional steps/distance that I have not taken when the fps spikes or lags, or if it is a bug when using dedicated mobile 30 Series GPUs, or it is a combination of these factors, or these in tandem with some other unknown factor.  Either way Its making the game unplayable, especially when it is raining with-in the game.

When using my dedicated RTX 3060 6GB GPU, I could get up to a 70fps, sometimes 80fps, however the Java version was more stable when I keep it at up to 60fps, which I did. However, since the recent Java Minecraft Updates, when using the Dedicated GPU, the FPS on my Laptop is now only stable between 30 to 40 fps. When the game uses my dedicated GPU, it also seems not to be using my CPU efficiently. When the dedicated GPU is in use, my CPU will at times sit between 20% to 40 % usage, but most times it wants to throttle closer between 90% to 100% for seemingly no reason at all. Both lag spikes and severe fps drops have gotten more frequent when moving, raining, getting in & out of boats, and getting on & off horses. It seems it also makes wild horses are more prone to instantly kick me off, and random player auto-jumping when exiting boats in water. I keep my render distance at between 12 to 24, and the simulation distance between 12 to 16, on either Fancy or Fabolous settings. I do believe my High End ASUS 2021 Laptop can do fine at these settings, but Minecraft appears to definitely be mis-managing my CPU when the dedicated GPU is in use, or at the very least how they are supposed to work together.

I have noticed that hunger isn't as aggressive, when I turn my dedicated GPU off and just use the 11th gen, integrated i7 intel MOBILE CPU's graphics. However the games fps is too low when running on the 11th gen I7 intel CPUs by itself. Lag spikes don't happened anywhere close to as often either, when the dedicated GPU is not used. 

Some of the problems that I have listed may originate from another problem, but have been made more aggressive with the compatibility issues in mobile dedicated GPUS. Most of  problems seem to also happen in Bedrock edition, though no where as frequent. However, unlike the latest Java Updates, the latest Bedrock Updates is still be capable of keeping a constant fps closer to 60fps, sometimes up to 70fps, when Nvidia's dedicated GPU is active. Although, it seems both Minecraft Bedrock and Java edition are still aggressively mis-counting my hunger depletion when the dedicated GPU is used, especially when these lag spikes occur.

Perhaps there may also be a bug when running Minecraft on Newer GPU's that have settings for low latency that limit queued frames from the GPU to the CPU? Unfortunately, this is just a guess offered by me, that only can learn via the process of elimination, as I have little to no experience in the technical side of Minecraft.

I know your supposed to list 1 problem, 1 report. But I do believe this problem(s) are from the same 1 bug, or a few closely related ones. Also, I was experiencing these problems when my Laptop was plugged in, regardless if the dedicated was used or not. I don't play games unless my Laptop is Plugged in.

My Laptop, if needed for a reference:

2021 ASUS TUF Dash F15 Gaming Laptop / FHD1080p 144 hertz

Windows 11 Pro

3060 6GB Nvidia RTX mobile GPU

Intel 11th Gen i7-11370H CPU 4 cores, 8 Threads (12M Cache) 3.30 GHz base speed / turbo Speed 4.40 GHz-4.80 GHz/ Rarely breaks 4.50 GHz-4.60GHz

PCIe NVMe Gen3 M.2 2280 Internal SSD - Up to 3500MB/S / probably runs closer "UP TO" 3200MB/S

32 GB Samsung Ram 3200MHZ DDR4