diff --git a/launcher/ui/pages/instance/ManagedPackPage.cpp b/launcher/ui/pages/instance/ManagedPackPage.cpp
index 5f108cf1..0b141a1f 100644
--- a/launcher/ui/pages/instance/ManagedPackPage.cpp
+++ b/launcher/ui/pages/instance/ManagedPackPage.cpp
@@ -193,6 +193,11 @@ void ModrinthManagedPackPage::parseManagedPack()
             return;
         }
 
+        // We block signals here so that suggestVersion() doesn't get called, causing an assertion fail.
+        ui->versionsComboBox->blockSignals(true);
+        ui->versionsComboBox->clear();
+        ui->versionsComboBox->blockSignals(false);
+
         for (auto version : m_pack.versions) {
             QString name;
 
@@ -328,6 +333,11 @@ void FlameManagedPackPage::parseManagedPack() {
             return;
         }
 
+        // We block signals here so that suggestVersion() doesn't get called, causing an assertion fail.
+        ui->versionsComboBox->blockSignals(true);
+        ui->versionsComboBox->clear();
+        ui->versionsComboBox->blockSignals(false);
+
         for (auto version : m_pack.versions) {
             QString name;