fixup! fix: appropriately map array variables to scalarized versions in add_fallbacks!

Author: AayushSabharwal

src/systems/problem_utils.jl

@@ -158,8 +158,8 @@ function add_fallbacks!(
                     fallbacks, arrvar, nothing) get(fallbacks, ttarrvar, nothing) Some(nothing)
                 if val !== nothing
                     val = val[idxs...]
+                    push!(arrvars, arrvar)
                 end
-                push!(arrvars, arrvar)
             else
                 val = nothing
             end