I don't think I've ever had this issue. Here's the full method.
Put teabag and spoonful of sugar into mug, pour maybe 2cm of water into mug. Nuke for about a minute. Let sit for a bit. Agitate the teabag a bit to get more of the delicious leaf juice out. Chuck out the tea bag. Pour in milk. Nuke for 20 secs. Done.
Seriously though, that sounds like a very different method to just pouring boiling water on the bag and then adding milk and sugar. Have you done both and compared?
It's been 3 weeks, haha, but yeah I got around to giving it a try. The verdict is... It's basically the same. I will be continuing to do it the way that I did before since it's easier, but I have enjoyed this experience of having my horizons broadened :D
I am a bit surprised, but I suppose for science I should really try following your method and seeing how it compares. I'll report back if I survive the ordeal.