It looks like this is a regression of an old problem? https://community.powerbi.com/t5/Issues/Random-semicolon-in-embedded-report/idi-p/521069 You can see them in some of the Embedded Playground ...
v-qiuyu-msft
Community Support
Community SupportHi mikegoatly,
The same issue has been reported internally: CRI 144745435. Will update here once I get any information.
Best Regards,
Qiuyun Yu