I haven't been gaining achievements on Minecraft Bedrock for Windows 10 for sometime now. I found the solution to that, at some point I had disabled the "Connected User and Telemetry". Once I changed this to automatic I began gaining achievements.
But I do not get the achievement pop-up that should come up in the top right-hand side of the game.
I have contacted support and done all the trouble shooting, including restarting my PC, signing out of my microsoft account, and reinstalling Minecraft Bedrock, and I still cannot get the achievement pop-up in-game.
Finally support told me to post it as a bug here in hopes that it can be fixed or a solution can be found.
I haven't added a screenshot because it won't show anything except a blank top right-hand side of my screen.
I have a similar bug, XBox and Minecraft wont notice any of my achievements, even when i literally create a new untouched world and try to get the easiest of them all, Open your Inventory...
STILL DIDNT GET THE ACHIEVEMENT!
Gamerscore is stuck on 0G for Windows 10 Edition, but i was getting all the Achievements on Android Edition