Well, it's a bit of a problem for me as I was trying to author a short paper on the derivation and usages of the lognormal power <==> normal in dB transform pair and being able to show their correspondence was the point.True, it's a bit overkill as the Normal -> LogNormal transform seems to reliably evaluated and LogNormal -> Normal evaluation with E^ just not with 10^ or Log[10] in the exponent. It's also a little strange that including a constant or variable it still evaluates, but include the particular constant Log[10] causes it to remain un-evaluated. I suspect that there is some command I'm missing that influences the order or treatment, but trying hold and various version of expand and simplify didn't work, but since I was guessing about why it didn't evaluate in the first place, wasn't likely that adding random commands would address the issue.