core: fix incoming messages by sysid #3549

Job	Run time
coverage (ubuntu-20.04)	5m 22s
alpine 3.16.0 (musl)	47m 22s
ubuntu-20.04 (package, non-mavsdk_server)	6m 21s
Ubuntu/Debian packaging (Ubuntu 20.04)	7m 25s
ubuntu-22.04 (package, non-mavsdk_server)	5m 29s
android-arm	16m 20s
linux-armv6	5m 40s
android-arm64	16m 51s
linux-armv7	5m 43s
android-x86	17m 4s
linux-armv6-musl	34m 35s
linux-arm64	5m 49s
ios	52m 45s
android-x86_64	17m 4s
linux-armv7l-musl	35m 53s
ios_simulator	25m 20s
linux-arm64-musl	37m 25s
macOS	6h 0m 15s
ubuntu-20.04 (mavsdk, hunter)	6m 42s
macOS-framework	6h 0m 15s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	5m 4s
ubuntu-22.04 (style and proto check)	20m 14s
ubuntu-20.04 (mavsdk_server, superbuild)	36m 45s
Windows	1h 3m 29s
ubuntu-22.04 (mavsdk_server, superbuild)	31m 45s
iOS XCFramework	0s
	20h 26m 57s

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