/fill command is not working at some random unknown reasons - when I try erase some terrain with /fill x y z x y z air it shows notification "You can't place blocks over the world" (second screenshot, my client is in polish language).

Important details:

• its not just air, i cannot put any other blocks cuz the notification stays the same. 
• Each commands are in the block limit range, so its not a fault of passing the 32768 blocks limit. When you put cords that results in passing the limit, the notification will show correctly that the limit is passed. 
• Last time I was able to use /fill command was when i was building a skycraper and i was able to create 205 blocks max. There was no "you can't put blocks over(...)
• When I discovered this bug first time I was building parking lot and i wanted to fill the area with black concrete and since then this error bullies me. It's not fault of wrong block ID cuz 1. Much previously i sucessfully used this command on much bigger are with also black concrete, and There was no notifications 2. You can get those blocks with /give command. I cannot use concrete blocks in /fill but when i used /give to get some for example pink concrete, I did it with no trouble
• The "replace" varriant of /fill command also didn't work

Sorry for my English. I can provide evidence about pointa above if needed.