Trim Poppin - Best way to fix

[mi_steelhead]

Hi all. 2nd year and some of my corner trim / straight trim is popping off. The 1/4 inch stuff.......appears to be wrapped in the wallpaper material use all over in rest of camper. It's not a big deal......but I figured I'd asked the experts here for the best way to fix b4 I addressed them. It looks like they might of tacked on and they filled the little holes will putty and called it a day. The tacks/nails don't purchase much which is why it popped is my guess. So I'm thinking glue them and ????? Do I tack again? Didn't work last time. Is there a better fix for trim?

[The Newsoms]

I have some loose and my plan is to reattach with paneling nails. They’re kind of ribbed and have a little head on them and I’m thinking they’ll hold. We’ll see. I have way more trouble with screw covers popping off.