Lost Logbook after SU6 Server issues and a manually logoff

Are you on Steam or Microsoft Store version?
Are you using Developer Mode or made changes in it?
Brief description of the issue:
I installed successfully the SU6 yesterday, and was able to perform a test flight just fine. The logbook was still ok at this time. During a second test flight the server issues started and I thought a logoff and relogin might solve the issue. So I logged of during the second test flight. The sim kicked me out of the flight back to startup screen (currently this stone formation in Germany) an prompted me to reenter my Microsoft Account credentials. I did so, the sim started up, but now all my logbook entries were gone. The achievments and the overall flight time (in seconds) under the achievment tab are still there. Only the flight time in hours presented prominently in my profile tab and all the logbook entries are gone.
Provide Screenshot(s)/video(s) of the issue encountered:
Detail steps to reproduce the issue encountered:
PC specs and/or peripheral set up of relevant:
CPU: Intel i9-9900k
Mainboard: Asus Maximus Extreme XI
RAM: Corsair Vengeance DDR4-3733 64GB
GPU: MSI Geforce RTX 3090 Suprim X
Windows 10, Version 21H1, Build: 19043.1288
OS install medium: PCIe 3.0 NVme SSD (Samsung 970 Plus, 500GB)
Sim install medium: PCIe 3.0 NVme SSD (Samsung 970 Plus, 2TB)
Build Version # when you first started experiencing this issue: