universal lag problem (Bedrock on Xbox)

My forever world has started lagging constantly, and I don't know how to fix it. I'm not sure when it started. I quit this world around Christmas time to do a fresh speedrun with all the new updates, but now that that's done I've come back to my forever world to find lag everywhere. I don't think the lag was there a few months ago before I started the speedrun, but I also wasn't doing any big building projects back then, so I'm not 100% sure.

I started this world in 2022 on my Xbox Series S. It's currently 780 MB in size. I've had various lag problems in the past, especially around my home base (mostly from too many machines and entities), but I redesigned everything last year to solve all those problems.

The weird part is that this lag is EVERYWHERE. I've dealt with my fair share of lag in the past. Before I knew about most of the common sources of lag, my main base area was a disaster. But in the past, even when my base was bad, I could get the lag to go away if I went somewhere else. That's how I knew I had to redesign everything in the first place.

This time is different, though. The lag follows me wherever I go. It's not super bad. Just a slight delay when I open chests or mine a block or place a block. For the most part I hardly notice. When I'm trying to build something fast and laying down blocks as I run, however, that no longer works. If I walk sideways and hold down the mouse button to try to place a bunch of blocks in a row, about half of the blocks won't be placed.

Like I said, I'm really stumped. Was there an update recently that changed things? Does anyone else know what might cause universal lag no matter where I go? I'm open to all ideas.

Edit:

I got curious and checked some old back-ups of my world. I made one about 3 months ago in December, and that world runs fine. Same add-ons. Similar size (765 MG). Can't figure out why one works perfectly and the other is lagging out.

I'm going to go through and catalog all the changes I've made since the December back-up. One of these has to be the reason the current world is lagging.

1. Two small autocrafting machines in my main base that make fireworks. These only turn on for a few seconds when I take fireworks out of the chest. 2. A snowball fighting minigame on a mooshroom island. This has some redstone to distribute snowballs to the players at set intervals, but nothing big or fancy. Again, it's turned off when not in use. But it does have bubble elevators to move items around that are going non-stop. 3. A copper-golem sorting system at my raid farm. There's only one guy there. Can't imagine he's taking up that much brain power.

I'm going to keep looking. If I find anything else, I'll add it to the list.