diff --git a/R/Lrnr_base.R b/R/Lrnr_base.R
index 101b8eae..ebe07a02 100644
--- a/R/Lrnr_base.R
+++ b/R/Lrnr_base.R
@@ -177,21 +177,27 @@ Lrnr_base <- R6Class(
         ))
       }
     },
-    base_predict = function(task = NULL) {
+     base_predict = function(task = NULL) {
       self$assert_trained()
       if (is.null(task)) {
         task <- private$.training_task
       }
-
+      
       assert_that(is(task, "sl3_Task"))
       task <- self$subset_covariates(task)
       task <- self$process_formula(task)
-
+      
       predictions <- private$.predict(task)
-
       ncols <- ncol(predictions)
-      if (!is.null(ncols) && (ncols == 1)) {
-        predictions <- as.vector(predictions)
+      if(!is.null(ncols) && (ncols == 1)) {
+        if(is.data.table(predictions)) {
+          # if a data.table of packed predictions, return a matrix.
+          predictions <- as.matrix(predictions)
+        }
+        # if not packed predictions, return vector
+        if(!inherits(predictions[[1]], "packed_predictions")) {
+          predictions <- unlist(predictions)
+        } 
       }
       return(predictions)
     },
diff --git a/R/Lrnr_cv.R b/R/Lrnr_cv.R
index c626278e..282f8d9e 100644
--- a/R/Lrnr_cv.R
+++ b/R/Lrnr_cv.R
@@ -174,6 +174,8 @@ Lrnr_cv <- R6Class(
 
 
       predictions <- self$predict_fold(revere_task, fold_number)
+      # This might not be a matrix
+      predictions <- as.data.table(predictions)
       # TODO: make same fixes made to chain here
       if (nrow(revere_task$data) != nrow(predictions)) {
         # Gather validation indexes:
@@ -371,7 +373,7 @@ Lrnr_cv <- R6Class(
         list(
           index = index,
           fold_index = rep(fold_index(), length(index)),
-          predictions = data.table(predictions)
+          predictions = as.data.table(predictions)
         )
       }
 
@@ -392,9 +394,14 @@ Lrnr_cv <- R6Class(
 
       predictions <- aorder(preds, order(results$index, results$fold_index))
 
-      # don't convert to vector if learner is stack, as stack won't
+      
+       # don't convert to vector if learner is stack, as stack won't
       if ((ncol(predictions) == 1) && !inherits(self$params$learner, "Stack")) {
-        predictions <- unlist(predictions)
+        # if packed_predictions dont unlist
+        if(is.data.table(predictions)) predictions <- as.matrix(predictions)
+        if(!inherits(predictions[[1]], "packed_predictions")) {
+          predictions <- as.vector(predictions)
+        }
       }
       return(predictions)
     },
diff --git a/R/Lrnr_gam.R b/R/Lrnr_gam.R
index c52ec44e..24515ca3 100644
--- a/R/Lrnr_gam.R
+++ b/R/Lrnr_gam.R
@@ -77,7 +77,7 @@ Lrnr_gam <- R6Class(
     }
   ),
   private = list(
-    .properties = c("continuous", "binomial"),
+    .properties = c("continuous", "binomial", "weights"),
     .train = function(task) {
       # load args
       args <- self$params
@@ -87,6 +87,7 @@ Lrnr_gam <- R6Class(
       Y <- data.frame(outcome_type$format(task$Y))
       colnames(Y) <- task$nodes$outcome
       args$data <- cbind(task$X, Y)
+      args$weights <- task$weights
       ## family
       if (is.null(args$family)) {
         if (outcome_type$type == "continuous") {
diff --git a/R/survival_utils.R b/R/survival_utils.R
index dd11429c..eb36e1ef 100644
--- a/R/survival_utils.R
+++ b/R/survival_utils.R
@@ -32,11 +32,16 @@ pooled_hazard_task <- function(task, trim = TRUE) {
   repeated_data <- underlying_data[index, ]
   new_folds <- origami::id_folds_to_folds(task$folds, index)
 
-  repeated_task <- task$next_in_chain(
-    column_names = column_names,
-    data = repeated_data, id = "id",
-    folds = new_folds
-  )
+  nodes <- task$nodes
+  nodes$id <- "id"
+  repeated_task <- sl3_Task$new(repeated_data, column_names = column_names, nodes = task$nodes, folds = new_folds, outcome_levels = outcome_levels, outcome_type = task$outcome_type$type)
+
+  # The below errors when used in CV due to the stored row index not being reset in next_in_chain.
+  #repeated_task <- task$next_in_chain(
+   # column_names = column_names,
+    #data = repeated_data, id = "id",
+    #folds = new_folds
+  #)
 
   # make bin indicators
   bin_number <- rep(level_index, each = task$nrow)