VSCode intellisense issues with 2020.1.0b1

I’ve updated to 2020.1.0b1 and updated all related packages, including Visual Studio Code Editor to 1.2.0. I’m now getting some weird intellisense issues which both seem related to UnityEngine.CoreModule:

The first is Reference to type 'NativeArray<T>.ReadOnly' claims it is defined in 'UnityEngine.CoreModule', but it could not be found [Assembly-CSharp] - on any usage of NativeArray.Contains.

The second is that there’s no intellisense for any of the types/methods for the new Mesh API improvements introduced in 2020.1.0.

Neither of these prevents the code from compiling correctly, it’s just the code completion that’s broken.

Anyone else having this problem?

The intellisense code completion, when it fails for me I exit Unity, delete the .csproj and .solution files from the project, restart Unity and let them re-generate. That fixes it for me, for Visual Studio (not VS code)

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That has fixed it for me on VS Code too, thanks!