[Samsung Galaxy Note 10+ Questions & Answers] krbjmpr:
Would like to add some not-so-obvious tips.

I can duplicate on both of my Note10+ U1 and F/DS models.

Phone slows down when hot in effort to cool down. If that doesn't work, it begins to put hardware in deeper sleep States. If cooling is still not being accomplished, it will stop apps. Still getting / is hot? Then will turn off charging. Charging is actually modified power wise, and when occurs is highly dependent on battery temperature.

Case Type.

Be mindful of type of case you are using. This is perhaps my biggest thorn. I was using a nice thick rubber(?) case, bought on Amazon. While phone very well protected, I am convinced it trapped heat. Yeah, I know majority of cooling occurs through display. Case henders other cooling, and overall when face down.

A similar case was found from Otter Box that is very similar, more refined, and interior shell fits phone much more closely without a thick pad of foam. It still has a thin layer, not nearly as thick. Incidentally, Otter Box

(Defender I think) is a solid half in (13mm) thinner overall than the other case. On same note, Otter Box doesn't claim to be able to protect against being run over by semi-truck / tractor or Backhoe or M1 Abrams or whatever odd situation you may find yourself in. If you have to plan for this, your life is definitely more interesting than mine.

Inductive chargers.

Great devices, really cuts down on port wear and tear. Not all created the same. Samsungs 4" square models, both white and black, are fan cooled, and work best for me.

My 3 pad 50w (total) charging pad was not fan cooled. Heat internally generated just baked whatever was sat on top. You know, heat rises and all. That brings me to another point: Alignment. This charging pad was not fussy how device was set upon it. But, a little bit of misalignment yielded greater heat generation. I used an external current meter (fluke 89, if it matters) and found optimal placement. Was very surprised when it wasn't over the X. Quite far off actually. Confirmed with interior inspection of coils.

Mobile mounts, aka dash/windshield mounts, are even more particular. Smaller coils require better magnetic alignment. Very prone to getting very hot if left in windshield on sunny days. In addition, additional heat negatively affects electronics. Looking at you Apple Mag Safe dash mount.

My Amazon Qi Phone/Watch/Buds generic charging station is truly abysmal. While it charges phone ok, nice and slowly as desired, the watch (46mm classic 4) and both Buds 1 PRO AND 2 Pro overheat. Pretty sure charging profile wax intended for Mr Charleroi Cookers. Turns out, very exact placement us needed. For the watch, switching to stainless mesh magnetic band did the trick. Looks / feels better too. I stopped charging buds this way. Now just use samsungs charge pad every couple weeks.

Wired Charging

if s.o.c. dissipates heat through display, what about battery? Yup, primarily through the rear of phone, now insulated by nifty 2 element M1 Abram - proof case. Don't use your 45w external QC1000 (whatever) charger. I limit mine to regular usb max, 2.4A @ 5vdc, travel is a QC1 that throws 12w (? Not sure). It may take 4 hours to charge, but I am normally in my own Deep Power Conservation Sleep state and doesn't affect me. I don't need to charge during the day. When traveling, I have my Dashmounted Tab Active2 to guide me. And play Spotify.. And interfaces with vehicle with Torque Pro.. It wants to overheat often, don't get me started on its heat problems.

Use a *Good* charging cable, Rated at 5A. Why? These usually have robust connectors, minimize connection resistance, and heat generated. Also, the heavier gage wire and robust connector help to wick away heat as well.

So, TL:DR yields it may not be the apps causing problem.