diff --git a/mission/controller/acs/SensorProcessing.cpp b/mission/controller/acs/SensorProcessing.cpp
index 975b38b1..23388e5f 100644
--- a/mission/controller/acs/SensorProcessing.cpp
+++ b/mission/controller/acs/SensorProcessing.cpp
@@ -18,6 +18,9 @@ void SensorProcessing::processMgm(const float *mgm0Value, bool mgm0valid, const
   double magIgrfModel[3] = {0.0, 0.0, 0.0};
   bool gpsValid = false;
   if (gpsDataProcessed->source.value != acs::GpsSource::NONE) {
+    // There seems to be a bug here, which causes the model vector to drift until infinity, if the
+    // model class is not initialized new every time. Works for now, but should be investigated.
+    Igrf13Model igrf13;
     igrf13.schmidtNormalization();
     igrf13.updateCoeffGH(timeAbsolute);
     igrf13.magFieldComp(gpsDataProcessed->gdLongitude.value, gpsDataProcessed->gcLatitude.value,
diff --git a/mission/controller/acs/SensorProcessing.h b/mission/controller/acs/SensorProcessing.h
index 7caa29f8..fea0fd01 100644
--- a/mission/controller/acs/SensorProcessing.h
+++ b/mission/controller/acs/SensorProcessing.h
@@ -35,8 +35,6 @@ class SensorProcessing {
   static constexpr double ZERO_VEC_D[3] = {0, 0, 0};
   static constexpr double ECCENTRICITY_WGS84 = 0.0818195;
 
-  Igrf13Model igrf13;
-
  protected:
   void processMgm(const float *mgm0Value, bool mgm0valid, const float *mgm1Value, bool mgm1valid,
                   const float *mgm2Value, bool mgm2valid, const float *mgm3Value, bool mgm3valid,