This is me vaping on mine at just 12w ... the top line is the battery voltage, which drops when I vape, then bounces back as soon as I stop .. the bottom line is battery percentage, it drops from 59% to 57% in a few puffs.
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This is it 20 seconds after stopping vaping.
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as you can see the percentage has risen back to 60% and the voltage is rising too,it's pretty normal for cells to recover like this ...do you think this is all that is happening with yours or is something else going on? bearing in mind you are vaping at 60w not 12w so your battery drop and recovery will look more dramatic. If it bothers you change the percentage display to amps or something and just use the bar which will appear much more stable.