There is a new pull request by ndgnuh against master on the void-packages repository

https://github.com/ndgnuh/void-packages ibus-bamboo-0.4.9
https://github.com/void-linux/void-packages/pull/12551

ibus-bamboo: update to 0.4.9
- Tone/Mark can be added to existing words
- Bug fixes

A patch file from https://github.com/void-linux/void-packages/pull/12551.patch is attached