The last Kusama runtime upgrade introduced an issue that may result some XCM transfer to be partially executed. For more details, please check this post.
The KSM are sent to the Karura sovereign account on Kusama however due to the issue, Kusama did not send XCM to Karura to allow Karura to credit the received KSM to destination account. In order to correct this, this proposal will mint those KSM on the destination account at Karura.
A list of impacted transfers into Karura are collected and can be view here.