I'm thinking I'm not sure I would want to vape anything that would do that to plastic.......
Me either, but I've never heard of it doing that to any other carto or tank. It's always the Stardust styles. It clouds up the tank and melts the tip, I have no idea why. This might apply to more juices than you'd think.
For instance, a ton of people are big fans of the red-hot flavors like atomic cinnacide, cinnabomb, fire n ice or whatever names it goes by. This flavor of juice (maybe not necessarily those particular brands I listed) is known to do the same thing to stardust style cartos and their tips. Granted, maybe not every juice that's this flavor is gonna cause such a problem and formulas can vary by vendor, but it does happen.
Fruit flavors that might otherwise seem pretty harmless can do it, even if they don't seem acidic. It comes down to the formula. I saw a report where someone said their banana flavored juice did it.

There's also probably a lot of variables that can cause such a reaction, I have no idea. But it happens and people aren't really aware. They should either be aware, or the plastic should be changed.
For what it's worth, I put the lemonade aside for now.