Hi, I have this issue with exynos 4g s20+ phone. Its effected on both wireless and wired charging. It took 2 hours and 20 minutes to full charge with original wired charger. With 15W fast wireless charger stand, it took nearly 2 hours to charge just from 75% to 85%. I have use this two methods to charge exynos S7 edge and have no issures. It completed charging by suggested time estimated on the phone. Restarting and unplug - plugging did not worked for me. Moreover, when i use wireless charging stand and AKG headset or any other type c item plugged into the phone at the same time, it switched from fast wireless charging to normal wireless charging and estimated time shown as 4+ hours to complete. With current issue i guess it will took at least 24 hours to fully charge. PS: because of awesome Note7 coverage from you I have brought S7 edge. Thanks a lot man.
