Not good. Can you try to set the tnoEE.show_valueRatio setting to 0? And if that works, tell me which value and weight the Brown Linens has? Further, drop them from your inventory, open the console, click on them so that their name/formId is displayed, then type: "set tnoDS.value to GetFullGoldValue" and "set tnoDS.value to GetWeight" and report what gets written to the console.
It would be great if you could do this.

I assume you mean tnoDS.show_valueRatio to 0.

I had that set already - I don't use the value ratio feature. There should be no divide by zero issues with these. Value and weight from inventory menu: 30 and 1. After dropping on ground and running set commands: 30.00 and 1.00 displayed in console. Did all this with 1.3.1 since I can't even retrieve them with 2.0. I could try installing 2.0 and loading a saved game after I have the pants in my inventory - would you like me to try that? I am running the Stock Clothing and Armour for Robert's Muscular, but I don't think that changes the statistics, I think it only changes the meshes. As far as I know, I'm not running anything that would alter the statistics (other than cost) of the stock clothing.
Edit: Ok, I went ahead and tried loading 2.0 after picking up the pants - and it's fine! So for some reason, I couldn't take the pants out of the sack, but once they are in my inventory, things seem to be fine. I get the same results from the set commands in the console: 30.00 and 1.00.
Now that I've loaded up 2.0, I will continue to play with it loaded. We'll see what happens when I loot another container and if I have anymore trouble, I'll let you know. I wonder what it was having a hissy fit over though... Very odd. But once the pants were in my inventory, I was able to drop them, run the console commands and pick them back up again! Now the only difference between now and my original problem is that I wound up installing DS 2.0 after EE 5.2... When I upgraded the first time, I uninstalled both mods, installed DS 2.0 then EE 5.2. When I ran into trouble, I uninstalled EE, reverted it back to 5.1 and still had trouble. Then I uninstalled DS 2.0, reverted it back to 1.3.1 and the problem went away. Then I uninstalled EE 5.1, installed 5.2 and continued my game. Now I just uninstalled DS 1.3.1, and installed 2.0 and voila! Go figure...
Edit 2: Ok, I just had to go back to the save before grabbing the pants: and the same thing happens. It still crashes when I take the pants out of the sack... So, as I said, I'll continue playing for now with 2.0 and I'll see if it crashes the next time I loot something - especially when I only grab one item from a container.
15th Edit: Last one! I've confirmed that it will crash if I only grab one item from a container. If I do a Take All, it's fine, but if I click on the specific item I want, crash, as soon as I close the container. Doesn't matter what the item is. I only use the mouse to click on the item I want - I don't try to use the keyboard or anything like that.