Hi,
I'm experiencing a strange behaviour with inserters in science labs while researching the kovarex enrichement tech.
I'm doing it in default mode (75x10 of red/green/blue/purple science + 1x10 nuclear), no idea if the issue is present also in others.
Normally, in a series of science labs connected by inserters, the inserters move science packs along the line leaving 2-6 packs in each lab per type.
Since I started reaserching kovarex, each of the labs is filling with red/green/blue/purple up to 200 unit (the max capacity, which normally is achievable only by manual filling or with loaders). I changed the researched recipe to other sciences (with or without nuclear science in the recipe) and the behaviour of inserters not mooving up to 200 packs to the last lab of the chain was restored.
I believe it is not an intentional behaviour, would you mind to verify the issue?
Thanks a lot in advance, and great idea for the mod.

It's a consequence of fitting the Kovarex research into this mod. You can see the discussion here: https://mods.factorio.com/mod/atan-nuclear-science/discussion/675caac1b7aaf65e16de7e41

Daisy chained labs, much like regular assemblers, try to keep a buffer of resources to produce the next item (or round of research for labs). This is vanilla behaviour. You run into this issue when the thing you are researching requires a lot of one type of science pack per cycle, which doesn't come up in vanilla.

Kovarex is pretty important for this mod -- you need a reliable uranium-235 supply for nuclear science pack production. But Kovarex can't be unlocked right away. The original design was just to add nuclear science pack to the cost of vanilla Kovarex research. But Kovarex is expensive, and this means you have to stockpile a lot of uranium-235, which takes a lot of time and/or centrifuges doing uranium processing. Feedback indicated that wasn't fun. So I followed the suggestion in the linked thread to make it so you need far fewer nuclear science packs compared to other packs for Kovarex.

But it's not an ideal solution, given the daisy chained lab thing. The original solution isn't great either. So I included the setting for the player to pick which option they want to use, and something had to be the default.

Your labs will return to normal behaviour once Kovarex research is done. If that's not satisfactory, you can try the other options for Kovarex -- expensive mode or make it a trigger tech. If those don't appeal, I'm always open to suggestions.

I missed the details of the aforementioned post, sorry now I understand the whole thing.
Meanwhile, my kovarex research finished and the labs went back to normal, so no more issues in this run.
Waiting for the atom forge release (as I saw in other discussions), thanks again :)