It's a Reltex Lactae Hevea sole if that helps. The rest of the soles look great, there's virtually no heel drag. Must have been a fluke/weird occurrence.

And they're Blake stitched so I could definitely get them resoled, but idk if I'd want to buy them and get them resoled off the bat as opposed to just buying a new pair.

I was even thinking about using something like this https://www.amazon.com/Versimold-Versatile-Moldable-Silicone-Projects/dp/B08L5PVYM3/ref=asc_df_B08L5PVYM3/?tag=hyprod-20&linkCode=df0&hvadid=476145629728&hvpos=&hvnetw=g&hvrand=15186086951897168394&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9007258&hvtargid=pla-996748003845&psc=1 or https://www.amazon.com/FUSING-900-Moldable-Silicone-Putty/dp/B07RV5R33Y/ref=pd_aw_lpo_1?pd_rd_i=B07RV5R33Y&psc=1 just as a patch until I wear the soles down enough for a proper resole. Or even just throwing some shoe goo in the gap.

I'll ask the seller if he can provide some more pictures regarding the sole of that boot.

Thanks for the info!