All those Iris Plus-related bug fixes Intel have been releasing over the past three months have yet to arrive on the Surface Pro 7 despite the fact that this is supposed to be Microsoft's latest flagship Windows tablet. Though we don't know when the update will arrive, Microsoft says they are working on a solution.
https://www.notebookcheck.net/Ice-Lake-issues-Microsoft-is-aware-that-the-Surface-Pro-7-is-currently-stuck-on-months-old-broken-graphics-drivers.443014.0.html