We have an internal report that Hebrew compact number formatting uses Latin (LTR) "K" which scrambles text if embedded in a Hebrew (RTL) message. (googleissue:171255577)
I looked at it, and the long forms are ok, but the others are not. One possibility: surround the K with RLMs.
Mark as fixVersion:38.1, meaning candidate for fix. Might do dot release, might just fix in maintenance version. Add to Known Issues on release page.