Did it get harder to overtake other riders?

Recently I found it a lot harder to overtake other riders especially on hills.

Even when your speed is 3+ km/h faster and power-to-weight ratio 1w/kg more than someone in front of you, you cannot overtake them sometimes, which I find very incomprehensible and frustrating.

 

If you don’t know what I’m talking about, please watch the zwift videos below which totally captured scenes where it happens.

https://youtu.be/RIRArQge3dM?t=10m30s

The speed goes down from 21 km/h to 18km/h in an instant, the player getting trapped by another rider who rides at 3 km/h lower speed and approximately 1 less watt per kilogram.

https://youtu.be/OI87itUYGvM?t=33m18s

Here’s another instance where the player gets a massive 4km/h drop in speed despite putting in a serious effort, getting trapped by someone who’s not even competing  in the race.

 

I really love racing on Zwift so I would like the Zwift team to consider fixing this problem.