diff --git a/Project.toml b/Project.toml
index 689ed564..3f40f0ec 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "RecursiveArrayTools"
 uuid = "731186ca-8d62-57ce-b412-fbd966d074cd"
 authors = ["Chris Rackauckas <accounts@chrisrackauckas.com>"]
-version = "3.38.0"
+version = "3.39.0"
 
 [deps]
 Adapt = "79e6a3ab-5dfb-504d-930d-738a2a938a0e"
diff --git a/ext/RecursiveArrayToolsSparseArraysExt.jl b/ext/RecursiveArrayToolsSparseArraysExt.jl
index 929f63f5..a8ed047d 100644
--- a/ext/RecursiveArrayToolsSparseArraysExt.jl
+++ b/ext/RecursiveArrayToolsSparseArraysExt.jl
@@ -18,4 +18,8 @@ function Base.copyto!(
     dest
 end
 
+# Fix for issue #486: Define issparse for AbstractVectorOfArray
+# AbstractVectorOfArray is not a sparse array type, so it should return false
+SparseArrays.issparse(::RecursiveArrayTools.AbstractVectorOfArray) = false
+
 end
diff --git a/src/array_partition.jl b/src/array_partition.jl
index 5eb1289a..491abfe2 100644
--- a/src/array_partition.jl
+++ b/src/array_partition.jl
@@ -124,6 +124,12 @@ Base.ones(A::ArrayPartition, dims::NTuple{N, Int}) where {N} = ones(A)
     return :($res)
 end
 
+## resize!
+function Base.resize!(A::ArrayPartition, sizes::Tuple)
+    resize!.(A.x, sizes)
+    A
+end
+
 ## vector space operations
 
 for op in (:+, :-)
diff --git a/test/interface_tests.jl b/test/interface_tests.jl
index 3384848a..18b8853d 100644
--- a/test/interface_tests.jl
+++ b/test/interface_tests.jl
@@ -303,3 +303,24 @@ end
     darr = DiffEqArray([ones(2)], [1.0], :params, :sys)
     @test darr.sys == :sys
 end
+
+@testset "issparse for AbstractVectorOfArray (issue #486)" begin
+    using SparseArrays
+
+    # Test that issparse returns false for VectorOfArray
+    testva = VectorOfArray([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
+    @test issparse(testva) == false
+
+    # Test that issparse returns false for DiffEqArray
+    testda = DiffEqArray([[1, 2, 3], [4, 5, 6], [7, 8, 9]], 1:3)
+    @test issparse(testda) == false
+
+    # Test the original issue: issparse should work with SubArray views
+    # This was failing before because issparse(::SubArray) calls issparse on the parent
+    testview = view(testva, :, :)
+    @test issparse(testview) == false
+
+    # Test with nested VectorOfArray
+    nested_voa = VectorOfArray([testva, testva])
+    @test issparse(nested_voa) == false
+end
diff --git a/test/partitions_test.jl b/test/partitions_test.jl
index 27abfaf6..2487dbdb 100644
--- a/test/partitions_test.jl
+++ b/test/partitions_test.jl
@@ -60,6 +60,10 @@ copyto!(p, c)
 @test c[1:5] == p.x[1]
 @test c[6:10] == p.x[2]
 
+resize!(p, (6, 7))
+@test length(p.x[1]) == 6
+@test length(p.x[2]) == 7
+
 ## inference tests
 
 x = ArrayPartition([1, 2], [3.0, 4.0])