Small question about problem #1: what version of RStudio are you using? There was a previous report of plotly maps not displaying correctly that was solved by installing the RStudio 1.2 Preview release:
For question #2, thanks for providing an example! I’m not able to run your code at the moment, but will try to give it a go soon. In the meantime, I’m a little confused about what your current system setup is where the problem is still showing up. Can you please paste in the output of sessionInfo() from a session where you tried to run the shiny app locally?
R 3.5.0 was a major update with changes to R internals that make it necessary to re-install packages. The warnings about that can be confusing but it doesn’t mean the packages are incompatible with R 3.5.0.