This is a Level 3 guest in 0.3.0.6 for room service. Julia's skills here are maxed out at Level 3 as well:
This is a Level 3 guest in 0.4.0.6 for room service, freshly checked in starting from the exact same save. Julia's skills are apparently at Level 4 and she should have the exact same level of experience:
It's not exactly the same guest (because existing guests from an 0.3 save are broken in 0.4), but that's a massive decrease in efficiency when she's supposed to be at max level. And when I check in a Level 4 guest, none of my staff are able to satisfy them even after I've bought all the extra satisfaction perks in each room. Additionally, if Julia is supposed to be at Level 4 (the stated max for this version) why is her skill bar still increasing here?:
As I said, I'm pretty sure this is a bug. The experience points got reset to zero but the skill level didn't, so there's something wonky going on. I'm not going to go to the mat for this, but I'd appreciate Faerin weighing in on the matter rather than continuing to speculate what's going on under the hood.