Description of the Issue

I do use a user defined language setting for Code highlighting.
Notepad++ is used with the German frontend.
Additionally I've set in Auto-Completion->Auto-Insert-> a Matched pair one with < and >
After closing and reopening notepad++ there is a >50% chance that the Matched pair setting is not more part of the configuration, instead you get again empty input fields.

Steps to Reproduce the Issue

1. Open Settings->Preferences->Auto-Completion->Auto-Insert
2. Set for Matched pair 1 < and >
   
3. Close the window, make sure settings are working
4. File-> Exit Notepad++
5. Start Notepad++ again
6. Auto completion for <> will not work anymore
7. If you check Settings->Preferences->Auto-Completion->Auto-Insert you will see that
   7.a your settings are lost (In this case you have to enter again the values)
   7.b OR settings are still displayed but will not work. (In this case, if you close now the window, you have the open completion settings working again)

Expected Behavior

Auto-Completion->Auto-Insert->Matched Pair settings should be remembered after restart.

Actual Behavior

Auto-Completion->Auto-Insert->Matched Pair settings are lost

Debug Information

N/A