https://bugs.winehq.org/show_bug.cgi?id=52627
--- Comment #4 from GizMo79 gizmo_1979@yahoo.it --- (In reply to Carlo Bramini from comment #1)
Created attachment 72198 [details] Output of FontForge with WineTahoma
It seems to me that Omega symbol (U+2126) is already implemented into WineTahoma, perhaps it is another font or a different issue.
I solved the bug by installing the tahoma2 component from the playonlinux menu, this means that the integrated wine font is buggy.
https://i.imgur.com/7LDf9a0.png
https://i.imgur.com/tagYOet.png