Debugger unusable anymore due to warnings

In the last week the debugger (run from the REPL inside VSCode) has stopped being usable. One issue is I constantly get warnings like the following:

1|debug> 
┌ Warning: Tuple{Plots.var"##plot#188", Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}}, typeof(plot), Vararg{Any}} was not found
└ @ Revise ~/.julia/packages/Revise/t6Vjc/src/packagedef.jl:1111
┌ Warning: Tuple{Plots.var"##plot#188", Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}}, typeof(plot), Vararg{Any}} was not found
└ @ Revise ~/.julia/packages/Revise/t6Vjc/src/packagedef.jl:1111
┌ Warning: Tuple{Plots.var"##plot#188", Base.Pairs{Symbol, V, Tuple{Vararg{Symbol, N}}, NamedTuple{names, T}} where {V, N, names, T<:Tuple{Vararg{Any, N}}}, typeof(plot), Vararg{Any}} was not found
└ @ Revise ~/.julia/packages/Revise/t6Vjc/src/packagedef.jl:1111

There are a number of other issues: breakpoints being triggered in the wrong function, macros not working, etc.

I don't remember seeing these issues 3–6 months ago so I'm not sure what's changed.

Start by reproducing the debugger from the Julia REPL inside VSCode and capture the Revise warning reported at packagedef.jl:1111. Investigate the reported warning, incorrect breakpoint locations, and non-working macros together, then verify that warnings stop and breakpoints and macros behave correctly.