Just as an update:
Most current tweet from @Forza_Support
"We have identified the issue with Car Mastery Skill Points in#ForzaHorizon4 and are working on getting a fix out on or before Monday the 13th of May. We recommend not spending any Skill Points at this time. More updates to come. "
Most current tweet from @Forza_Support
"We have identified the issue with Car Mastery Skill Points in