If anyone experiences issues with the Switchbot bonus selection (bonus list not displaying or updating correctly), I recommend checking the following before looking elsewhere:

packet.h (client and server)
Switchbot packet structures
Packet size consistency
Attribute information packets
Client ...

MartySama v5.8 p23 Compatibility Notes

I successfully integrated this Switchbot package into MartySama v5.8 p23.

The package works, but several compatibility adjustments were required to make it fully stable on this source.

To help anyone using the same base, here are the most important points ...