`vscodedisplay` no longer works after including DataFrame into image

This is really easy to replicate

using PackageCompiler
create_sysimage(:DataFrames, replace_default=true)

then restart Julia in VSCode

using DataFrames

a = DataFrame(a=1:3)


Then you will see that `vscodedisplay` no longer works 

julia> vscodedisplay(a)
┌ Warning: Cannot display values of type DataFrame in VS Code.
└ @ VSCodeServer c:\Users\RTX2080.vscode\extensions\julialang.language-julia-1.0.6\scripts\packages\VSCodeServer\src\display.jl:148

Should I file an issue with vscode plugin or PackageCompiler.jl? Feels like the former