Today, after charging my FP4 (only to 42%) I opened Maps, and a notification popped up, warning that the phone must cool down before using maps. Recently, I also noticed that after using my phone as a navigation system on bike rides with up to 100% brightness, my phone felt really hot. Now, after charging, it actually did not feel as hot as then. Curiously, after the bike rides, there was no such warning.
Is this a software problem? Does your FP4 get hot (with or without warning) sometimes as well? Should I ask Fairphone to check the hardware on my device?
Thanks for your comments.