jefpatat: You are not alone! I observe the same: There are more errors since a few days. VGTU has been rock-solid, but there are quite a few errors on my two computers since around 09th of March 2018.
Your observed RAC increase is because of the work-credit to computer time disparity since around the same time (7th of March). See below:
"Glad" it's not my host alone...
Leaving all other aspects the same credits earned vs CPU time should be constant and thus not impact RAC. RAC will be updated at larger intervals with larger credits. This might create some extra fluctuation but on average should not result in what is being observed here.