Hi, I noticed some parts of my bed that was not adhering correctly. 
I made this file to test and indeed the top right side was not correct. 

After a total reset of the printer and a good bed cleaning everything went back to normal. 

If you have some bed adhesion issue, you can check where with this print (less than 10mn). 

Don't forget to run a bed leveling before and do a good bed cleaning!

The white prints are before the tests, and the purple after. 
Huge difference!