1. Too thin?
Probably... there was a video online of a "bend test" in a lab where the handset exploded when the stress of bend ruptured the battery inside.
2. Overheating whilst charging?
500% more likely with Fast-Charge enabled. Fast-charge seems an insane invention / idea to me...
I have fast-charge disabled in my Samsung S7 Edge
- I don't need it, don't want it, don't trust it (and when I tried it once my handset got quite hot!)
Apparently USB-C can carry a higher current for charging. This combined with Fast Charge seems like pushing your luck to me!