diff --git a/include/mimalloc/internal.h b/include/mimalloc/internal.h
index 12d5b7ae..84460777 100644
--- a/include/mimalloc/internal.h
+++ b/include/mimalloc/internal.h
@@ -219,6 +219,7 @@ void        _mi_deferred_free(mi_heap_t* heap, bool force);
 void        _mi_page_free_collect(mi_page_t* page,bool force);
 void        _mi_page_reclaim(mi_heap_t* heap, mi_page_t* page);   // callback from segments
 
+size_t      _mi_page_bin(const mi_page_t* page); // for stats
 size_t      _mi_bin_size(size_t bin);            // for stats
 size_t      _mi_bin(size_t size);                // for stats
 
@@ -235,6 +236,7 @@ bool        _mi_heap_area_visit_blocks(const mi_heap_area_t* area, mi_page_t* pa
 
 // "stats.c"
 void        _mi_stats_done(mi_stats_t* stats);
+void        _mi_stats_merge_thread(mi_tld_t* tld);
 mi_msecs_t  _mi_clock_now(void);
 mi_msecs_t  _mi_clock_end(mi_msecs_t start);
 mi_msecs_t  _mi_clock_start(void);
diff --git a/src/heap.c b/src/heap.c
index cbfee560..f96e60d0 100644
--- a/src/heap.c
+++ b/src/heap.c
@@ -176,9 +176,7 @@ static void mi_heap_collect_ex(mi_heap_t* heap, mi_collect_t collect)
   _mi_arenas_collect(collect == MI_FORCE /* force purge? */);
 
   // merge statistics
-  if (collect <= MI_FORCE) {
-    mi_stats_merge();
-  }
+  if (collect <= MI_FORCE) { _mi_stats_merge_thread(heap->tld); }
 }
 
 void _mi_heap_collect_abandon(mi_heap_t* heap) {
diff --git a/src/page-queue.c b/src/page-queue.c
index 469e57d5..c719b626 100644
--- a/src/page-queue.c
+++ b/src/page-queue.c
@@ -140,7 +140,7 @@ static inline bool mi_page_is_large_or_huge(const mi_page_t* page) {
   return (mi_page_block_size(page) > MI_MEDIUM_OBJ_SIZE_MAX || mi_page_is_huge(page));
 }
 
-static size_t mi_page_bin(const mi_page_t* page) {
+size_t _mi_page_bin(const mi_page_t* page) {
   const size_t bin = (mi_page_is_in_full(page) ? MI_BIN_FULL : (mi_page_is_huge(page) ? MI_BIN_HUGE : mi_bin(mi_page_block_size(page))));
   mi_assert_internal(bin <= MI_BIN_FULL);
   return bin;
@@ -148,7 +148,7 @@ static size_t mi_page_bin(const mi_page_t* page) {
 
 static mi_page_queue_t* mi_heap_page_queue_of(mi_heap_t* heap, const mi_page_t* page) {
   mi_assert_internal(heap!=NULL);
-  const size_t bin = mi_page_bin(page);
+  const size_t bin = _mi_page_bin(page);
   mi_page_queue_t* pq = &heap->pages[bin];
   mi_assert_internal((mi_page_block_size(page) == pq->block_size) ||
                        (mi_page_is_large_or_huge(page) && mi_page_queue_is_huge(pq)) ||
diff --git a/src/page.c b/src/page.c
index 71fda0b3..2bbc2ed1 100644
--- a/src/page.c
+++ b/src/page.c
@@ -291,7 +291,7 @@ static mi_page_t* mi_page_fresh_alloc(mi_heap_t* heap, mi_page_queue_t* pq, size
   mi_assert_internal(full_block_size >= block_size);
   mi_page_init(heap, page, full_block_size, heap->tld);
   mi_heap_stat_increase(heap, pages, 1);
-  mi_heap_stat_increase(heap, page_bins[mi_page_bin(page)], 1);
+  mi_heap_stat_increase(heap, page_bins[_mi_page_bin(page)], 1);
   if (pq != NULL) { mi_page_queue_push(heap, pq, page); }
   mi_assert_expensive(_mi_page_is_valid(page));
   return page;
@@ -445,8 +445,7 @@ void _mi_page_free(mi_page_t* page, mi_page_queue_t* pq, bool force) {
   mi_segments_tld_t* segments_tld = &heap->tld->segments;
   mi_page_queue_remove(pq, page);
 
-  // and free it
-  mi_heap_stat_decrease(heap, page_bins[mi_page_bin(page)], 1);
+  // and free it  
   mi_page_set_heap(page,NULL);
   _mi_segment_page_free(page, force, segments_tld);
 }
diff --git a/src/segment.c b/src/segment.c
index 29502bcd..32841e6d 100644
--- a/src/segment.c
+++ b/src/segment.c
@@ -1023,6 +1023,7 @@ static mi_slice_t* mi_segment_page_clear(mi_page_t* page, mi_segments_tld_t* tld
   size_t inuse = page->capacity * mi_page_block_size(page);
   _mi_stat_decrease(&tld->stats->page_committed, inuse);
   _mi_stat_decrease(&tld->stats->pages, 1);
+  _mi_stat_decrease(&tld->stats->page_bins[_mi_page_bin(page)], 1);
 
   // reset the page memory to reduce memory pressure?
   if (segment->allow_decommit && mi_option_is_enabled(mi_option_deprecated_page_reset)) {
diff --git a/src/stats.c b/src/stats.c
index 74c1d7a6..2780b053 100644
--- a/src/stats.c
+++ b/src/stats.c
@@ -397,6 +397,10 @@ void mi_stats_merge(void) mi_attr_noexcept {
   mi_stats_merge_from( mi_stats_get_default() );
 }
 
+void _mi_stats_merge_thread(mi_tld_t* tld) {
+  mi_stats_merge_from( &tld->stats );
+}
+
 void _mi_stats_done(mi_stats_t* stats) {  // called from `mi_thread_done`
   mi_stats_merge_from(stats);
 }
@@ -500,7 +504,7 @@ static bool mi_heap_buf_expand(mi_heap_buf_t* hbuf) {
     hbuf->buf[hbuf->size-1] = 0;
   }
   if (hbuf->size > SIZE_MAX/2 || !hbuf->can_realloc) return false;
-  const size_t newsize = (hbuf->size == 0 ? 2*MI_KiB : 2*hbuf->size);
+  const size_t newsize = (hbuf->size == 0 ? mi_good_size(12*MI_KiB) : 2*hbuf->size);
   char* const  newbuf  = (char*)mi_rezalloc(hbuf->buf, newsize);
   if (newbuf == NULL) return false;
   hbuf->buf = newbuf;
diff --git a/test/test-stress.c b/test/test-stress.c
index d65c7f2e..4f5a3d58 100644
--- a/test/test-stress.c
+++ b/test/test-stress.c
@@ -343,6 +343,7 @@ int main(int argc, char** argv) {
     mi_free(json);
   }
   #endif
+  mi_collect(true);
   mi_stats_print(NULL);  
 #endif
   //bench_end_program();