diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 236f2d615e..d3a0a960e0 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -29,24 +29,41 @@ jobs:
       # - once stored under a key, they become immutable (even if local cache path content changes)
       # - for a refresh the key has to change, e.g., hash of a tracked file in the key
       with:
-        path: |
-          ~/.ccache
-          ~/.cache/ccache
-        key: ccache-linux-gccompompi-${{ hashFiles('.github/workflows/linux.yml') }}-${{ hashFiles('cmake/dependencies/AMReX.cmake') }}-${{ github.event.repository.pushed_at }}
-        restore-keys: |
-          ccache-linux-gccompompi-${{ hashFiles('.github/workflows/linux.yml') }}-
-          ccache-linux-gccompompi-
+        path: ~/.cache
+        key: ccache-${{ github.workflow }}-${{ github.job }}-git-${{ github.sha }}
+        restore-keys: ccache-${{ github.workflow }}-${{ github.job }}-git-
     - name: Build & Install
       run: |
+
+        export CCACHE_COMPRESS=1
+        export CCACHE_COMPRESSLEVEL=10
+        export CCACHE_MAXSIZE=1G
+        ccache -z
+
         pip install -U -e ./tools
+        export CXXFLAGS="-g -fsanitize=undefined,address -fno-sanitize-recover=all"
         cmake -S . -B build                        \
+            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache   \
+            -DCMAKE_BUILD_TYPE=Release             \
             -DHiPACE_COMPUTE=OMP                   \
             -DCMAKE_CXX_STANDARD=17                \
             -DCMAKE_INSTALL_PREFIX=/tmp/my-hipace  \
             -DCMAKE_VERBOSE_MAKEFILE=ON
         cmake --build build -j 2
+
+        ccache -s
+        du -hs ~/.cache
+
+
     - name: Run Tests
-      run: ctest --test-dir build --output-on-failure
+      run: |
+        #MPI implementations often leak memory
+        export "ASAN_OPTIONS=detect_leaks=0"
+
+        # Print stacktrace for easier debugging
+        export UBSAN_OPTIONS=print_stacktrace=1
+
+        ctest --test-dir build --output-on-failure
 
   linux_gcc_cxx17:
     name: GNU@7.5 C++17 Serial
diff --git a/src/particles/plasma/MultiPlasma.H b/src/particles/plasma/MultiPlasma.H
index 12549d09d0..99b4a864ef 100644
--- a/src/particles/plasma/MultiPlasma.H
+++ b/src/particles/plasma/MultiPlasma.H
@@ -1,6 +1,6 @@
 /* Copyright 2021-2022
  *
- * This file is part of HiPACE++.
+ * This file is part of HiPACE++ .
  *
  * Authors: AlexanderSinn, MaxThevenet, Severin Diederichs
  * License: BSD-3-Clause-LBNL
@@ -91,7 +91,7 @@ public:
      *
      * \param[in,out] fields the general field class, modified by this function
      * \param[in] which_slice slice in which the densities are deposited
-     * \param[in] gm Geometry of the simulation, to get the cell size etc.
+     * \param[in] gm Geometry of the simulation (to get the cell size etc.)
      * \param[in] lev MR level
      */
     void DepositNeutralizingBackground (