I am not at all shocked that your batter set up after you left it alone. I have had that happen when I walk away to answer the phone or some such when soaping, come back and my
I am not at all shocked that your batter set up after you left it alone. I have had that happen when I walk away to answer the phone or some such when soaping, come back and my batter is thick. The lye and oil will interact with each other if you just leave it and only stir occasionally.
As for the bubbly stuff, I am not positive, but it could just be air bubbles that rose to the top. I believe that excess lye would sink and not rise, but I could be wrong about that. Or it could be as you suggest. But there is an easy way to find out. Do the ZAP test. Here is a thread with clear instructions:
https://www.soapmakingforum.com/threads/how-to-properly-safely-conduct-the-zap-tongue-test.63199/
Try testing the surface area that your are concerned about, as well as inner surface areas after you have cut the soap into bars, which I assume you have already done. If the outer surface ZAPs, but the inner surface does not, then there is a concentration of lye. However, if neither ZAPs, then it's good to use. On the other hand, if both ZAP, you would have lye-heavy soap, but a long cure can decrease the ZAP if it's not excessively lye heavy given sufficient time. My guess is that you don't have lye heavy soap as long as you followed your posted recipe carefully.
How did the soap look after you cut it into bars? Was it smooth thoughout without any areas of softness or crumbly-ness? I'd love to see how it turned out after cut and what your ZAP test results are.