Today, after monitoring the issue we are ready to say that the issue is indeed fixed. As a form of compensation for the entire active community, we have decided to grant to all concerned following items. 3× 2h Boosters for progress of all types. A single Booster increases a player's progress by 100% (2×) for all types of progression during the next 2h after activation.  These Boosters have no expiry date and you can use them whenever you want.
To receive Boosters, you just need to log in to the game within 7 days (If this news is marked as: "LIVE NOW" you can still claim your bonuses).

Activation of Boosters.
Boosters must be activated in the "Custom Play" tab, where, once in this submenu, either click "b" (the standard assigned key) or click LMB on the caption "Boosters" located in the lower right-hand corner of the screen.

Please note.
Once activated, the booster is active 2h clock hours, regardless of whether you play or not.
Once again we apologize for the recent technical problems and hope that the compensation will allow you to get some of your lost progress back. Fall out Operators!