srinath009 , via OnePlus Nord , Sep 14, 2020 : The same thing happens with me. I totally agree with you and request OnePlus to consider this seriously.
josef127 , via OnePlus Nord , Sep 15, 2020 : you don't have an issue. When the battery is warm it will charge slower. So nothing need fix
josef127 , via OnePlus Nord , Sep 15, 2020 : No they don't need consider it because there is no issue
_pixl_ , via OnePlus Nord Gray Onyx , Sep 15, 2020 : https://forums.oneplus.com/threads/figured-out-problem-with-devices-not-warp-charging.1295457/ Check this out for the reason why. Leave a comment on the post so more people can see this
catalin.tanase , Sep 15, 2020 : You might find this odd, but I actually charge it using a slower charger (one which provides only 5w). Since I work from home it doesn't matter to me if the charging takes 4 hours. The faster you charge the battery, the shorter will be its life. If I'm in a hurry, then I use the Warp charger and that's it!