While analyzing the call qualities on Teams' Call Quality Dashboard, I noticed that since begin of March the one of transport protocol on Teams has been turn from "MultiTCP" to "MultiTurnTCP". Together with this I noticed that Microsoft has started to rollout client version 1.5.4767.
This is how it looks from statistics point of view:
These are shares in percent, 100% on top. You can see how light blue gets squeezed and light brown started to grow up and replaces it completed. Don't worry about the weekends.
Interesting question is of course, what is the "Multi Turn TCP"? At least CQD documents does not speak about it: Microsoft CQD: Available Dimensions. Perhaps they just rename it?