ctme2000 says:
Hey, page 198 as well. My understanding is that the 5 temp hit points is it's own thing, not effecting my regular HP at all. Think of it as a force field around me that has 5 points. Once those 5 points are gone, it starts effecting my regular HP. If you have an email address you're willing to share, I can send a cut of the exact text I'm referring to. Don't know how to add an image in gamer's plane via the image function.
I gotcha on how the Temporary Hit Points works out; that seems understandable enough. I'm just not understanding where the number "+5" specifically comes from. The way I'm reading it, when Osvaldo uses his Tireless Feat he rolls 1d10 and adds his +2 WIS Modifier and the result is how many Temp HP he gets, even if he's maxed out on HP as it is because they stack with current HP. But the way I'm reading it, Osvaldo roll for those Temp HP, and gets anywhere from 3-12 Temp HP depending on his d10 roll. It's not just a set-in-stone "+5 Temp HP" It's more likely going to be more than +5 depending on his d10 roll.
So as we stand, you were at 1HP. You declared to take a Short Rest
AND to use your Tireless Feat. For your Short Rest you rolled your Hit Die (a d10) and got a "10" (+2 CON Mod), for a total of 12 HP regained. This puts you at 13 HP, but you max out at 12 at this level, so Osvaldo currently is at full health with 12HP.
Now if you wanted to use your Tireless Feat as well, as written up in the UA Ranger, you get to roll another d10 and add your Wisdom Modifier (also a +2 for Osvaldo). These Hit Points stack on top of your currently maxed out HP and are burned off first if you're hurt.
I think I'm getting confused or hung up on the "+5" part of your explanation because I don't think the Temp HP are necessarily always a +5 across the board for your Ranger. I think they're 1d10 plus your +2 Wisdom Mod according to the Tireless description presented in the UA Ranger Class.
Does that make sense?