In case you don't need to switch between keyboard layouts, you can get some shortcuts working again if you use the "Tweaks" tool for Gnome.
sudo apt install gnome-tweak-tool
Then
1. Open "Tweaks"
2. Select the tab "Keyboard & Mouse"
3. Click "Additional Layout Options"
4. Disable entries in the "Switching to another layout" dialog
In my case this gave me back the "ALT + SHIFT" combinations which are essential in the Eclipse IDE for refactoring.
In case you don't need to switch between keyboard layouts, you can get some shortcuts working again if you use the "Tweaks" tool for Gnome.
sudo apt install gnome-tweak-tool
Then
1. Open "Tweaks"
2. Select the tab "Keyboard & Mouse"
3. Click "Additional Layout Options"
4. Disable entries in the "Switching to another layout" dialog
In my case this gave me back the "ALT + SHIFT" combinations which are essential in the Eclipse IDE for refactoring.