Ticking this does not help (as for me). @Paul, you could check that with VSSX_sampler, stencil sampler\micros for example (from your stencils).
I believe this is the newest Visio (Plan 2) build, can't be helped until Microsoft fixes it.
Screenshot from: Microsoft® Visio® Plan 2 MSO (Version 2112 Build 16.0.14729.20156) 32-bit

