Raspberry Shortcake bush turning brown

I purchased a Raspberry Shortcake from local nursery. It remained in the store pot, in partial shade, for longer than I wanted. (While I built and filled a raised bed for it.). I planted it in a 2’ tall metal raised bed. In full sun. I used the layered or maybe somewhat Hugelkultur (First year gardening.. bear with me) to fill the beds up to the last 6” or so. Which was cardboard, then logs and wood chips, then grass clippings, then my clay soil mixed with gypsum pellets, then sprinkled with bone meal and blood meal, then a layer of older horse manure.  The last 6”, I used Fox Farms Ocean Potting soil. I planted it, maybe too deep?.  Mulched with cocoa shell mulch.  Within a week of planting, it went from beautiful full green to brown leaves. Can anyone diagnose if I have to be worried about a disease?  Or did I burn it not hardening it to sun first?  Or is it a normal process (old canes die/new growing). No fruit or flowers this year, but it’s a new plant. There is a lot of new growth starting to bud out of canes.  New growth is growing fast a nice green. But from canes that are a mixture of brown and green.  Should I dig it up to make sure I didn’t plant it too deep?  Worried to stress it worse, especially with it being July.  

It’s probably sun burn. I’d give it some temporary shade. I usually use a plastic lawn chair, sometimes two. Keep it watered and it should be fine.

Thank you. That makes me feel better. I’m disabled and it was hard work filling that bed 😂 and don’t want the soil to be contaminated with disease already