Any reference for that? There is evidence that constant GPS use can heat up a mobile device, - and I can imagine that if you would constantly take geo-tagged photos every second for 25 minutes (that´s about the number given by
">@TheYayAreaLiving

) the phone indeed will get warmer. Or if you are in a place with e.g. an ambient temperature already around or above 35°C… in any case the iPhone will/should for example dimm down (or even black) the display or disable the camera flash - forgot about the flash as a source for heating up the iPhone

.
Yes, I know, it’s the beta and strange things happen… in any case - if the pano-function is continuously affected, it might be worth to reset the camera settings (sadly there is no individual reset for that, you have to go via
Reset All Settings, which will require to reconfigure network/keyboard/apple pay/location settings afterwards).