diff --git a/src/router/legacyPermalinkManagement.routerPlugin.js b/src/router/legacyPermalinkManagement.routerPlugin.js
index c91936e4a..0892fcd8d 100644
--- a/src/router/legacyPermalinkManagement.routerPlugin.js
+++ b/src/router/legacyPermalinkManagement.routerPlugin.js
@@ -147,18 +147,23 @@ const handleLegacyParam = (
             break
         // if no special work to do, we just copy past legacy params to the new viewer
         default:
+            // NOTE: legacyValue is parsed using URLSearchParams which don't make any difference
+            // between &foo and &foo=
             newValue = legacyValue
             break
     }
 
-    if (newValue) {
+    if (newValue !== undefined) {
         // When receiving a query, the application will encode the URI components
         // We decode those so that the new query won't encode encoded character
         // for example, we avoid having " " becoming %2520 in the URI
         newQuery[key] = decodeURIComponent(newValue)
         log.info(
-            `[Legacy URL] ${param}=${legacyValue} parameter changed to ${key}=${decodeURIComponent(newValue)}`
+            `[Legacy URL] ${param}=${legacyValue} parameter changed to ${key}=${decodeURIComponent(newValue)}`,
+            newQuery
         )
+    } else {
+        log.error(`[Legacy URL] ${param}=${legacyValue} parameter not processed`)
     }
 }
 
diff --git a/src/router/storeSync/__tests__/abstractParamConfig.class.spec.js b/src/router/storeSync/__tests__/abstractParamConfig.class.spec.js
index be062506c..2537bbd46 100644
--- a/src/router/storeSync/__tests__/abstractParamConfig.class.spec.js
+++ b/src/router/storeSync/__tests__/abstractParamConfig.class.spec.js
@@ -80,7 +80,7 @@ describe('Test all AbstractParamConfig class functionalities', () => {
                 })
                 expect(testInstance.readValueFromQuery({ test: 'true' })).to.be.true
                 expect(testInstance.readValueFromQuery({ test: 'false' })).to.be.false
-                expect(testInstance.readValueFromQuery({ test: '' })).to.be.false
+                expect(testInstance.readValueFromQuery({ test: '' })).to.be.true
                 // null value means the param without value, we want it to be true
                 expect(testInstance.readValueFromQuery({ test: null })).to.be.true
                 expect(testInstance.readValueFromQuery({})).to.be.undefined
@@ -135,7 +135,7 @@ describe('Test all AbstractParamConfig class functionalities', () => {
                 })
                 expect(testInstance.readValueFromQuery({ test: 'true' })).to.be.true
                 expect(testInstance.readValueFromQuery({ test: 'false' })).to.be.false
-                expect(testInstance.readValueFromQuery({ test: '' })).to.be.false
+                expect(testInstance.readValueFromQuery({ test: '' })).to.be.true
                 // null value means the param without value, we want it to be true
                 expect(testInstance.readValueFromQuery({ test: null })).to.be.true
                 expect(testInstance.readValueFromQuery({})).to.be.true
diff --git a/src/router/storeSync/abstractParamConfig.class.js b/src/router/storeSync/abstractParamConfig.class.js
index 5dc7e4f0d..bd2d6ad38 100644
--- a/src/router/storeSync/abstractParamConfig.class.js
+++ b/src/router/storeSync/abstractParamConfig.class.js
@@ -79,7 +79,8 @@ export default class AbstractParamConfig {
             // is present in the query (without a boolean value attached)
             return (
                 queryValue === null ||
-                (typeof queryValue === 'string' && queryValue === 'true') ||
+                queryValue === 'true' ||
+                queryValue === '' ||
                 (typeof queryValue === 'boolean' && !!queryValue)
             )
         } else if (queryValue === null) {
diff --git a/src/store/modules/geolocation.store.js b/src/store/modules/geolocation.store.js
index 44bde46c7..fa20e6197 100644
--- a/src/store/modules/geolocation.store.js
+++ b/src/store/modules/geolocation.store.js
@@ -19,7 +19,7 @@ const state = {
      *
      * @type Boolean
      */
-    tracking: false,
+    tracking: true,
     /**
      * Device position in the current application projection [x, y]
      *
diff --git a/src/store/plugins/geolocation-management.plugin.js b/src/store/plugins/geolocation-management.plugin.js
index bfb3fcf7c..ae99b96ba 100644
--- a/src/store/plugins/geolocation-management.plugin.js
+++ b/src/store/plugins/geolocation-management.plugin.js
@@ -55,9 +55,22 @@ const handlePositionAndDispatchToStore = (position, store) => {
         accuracy: position.coords.accuracy,
         ...dispatcher,
     })
-    // if tracking is active, we center the view of the map on the position received
+    // if tracking is active, we center the view of the map on the position received and change
+    // to the proper zoom
     if (store.state.geolocation.tracking) {
         setCenterIfInBounds(store, positionProjected)
+        // set zoom level if needed
+        let zoomLevel = STANDARD_ZOOM_LEVEL_1_25000_MAP
+        if (store.state.position.projection instanceof CustomCoordinateSystem) {
+            zoomLevel =
+                store.state.position.projection.transformStandardZoomLevelToCustom(zoomLevel)
+        }
+        if (store.state.position.zoom != zoomLevel) {
+            store.dispatch('setZoom', {
+                zoom: zoomLevel,
+                ...dispatcher,
+            })
+        }
     }
 }
 
@@ -120,7 +133,7 @@ const handlePositionError = (error, store, state, options = {}) => {
 }
 
 const activeGeolocation = (store, state, options = {}) => {
-    const { useInitial = false } = options
+    const { useInitial = true } = options
     if (
         useInitial &&
         store.state.geolocation.position[0] !== 0 &&
@@ -152,16 +165,6 @@ const activeGeolocation = (store, state, options = {}) => {
 
             // handle current position
             handlePositionAndDispatchToStore(position, store)
-
-            // set zoom level
-            let zoomLevel = STANDARD_ZOOM_LEVEL_1_25000_MAP
-            if (state.position.projection instanceof CustomCoordinateSystem) {
-                zoomLevel = state.position.projection.transformStandardZoomLevelToCustom(zoomLevel)
-            }
-            store.dispatch('setZoom', {
-                zoom: zoomLevel,
-                ...dispatcher,
-            })
         },
         (error) => handlePositionError(error, store, state, { reactivate: true }),
         {