First I'd recommend upgrading to VS 2019, because you're currently missing ~1.5 years' worth of improvements in C# and F# tooling (core development for VS 2017 stopped well before the VS 15.9 release to stabilize it). If it still reproduces, then please use the Report a Problem tool to file an issue. The team who builds C# tooling would be interested in fixing that kind of problem.
Oh for sure - I'm not using .NET/VS anymore different clients and all, and I think the team stripped out the F# tests out of the solution - just saying it couldn't have been the thing fixed 3 years ago.
