Here is what I did: I set a lock pattern additionally to my SIM lock PIN. Steps I followed:
- I rebooted.
- I have to insert my SIM PIN.
- I have to draw the lock pattern.
Conclusion: I cannot reproduce the issue.
Question to all of you: Are you using Google Apps? I am not…
PS.: @Scarlett After the troubles with 1.8 (Update postponed), Fairphone started a beta test group, where @Jerry participated, I believe (versions 1.8.1-1.8.4). The next official release will be 1.8.5.