Only this package is problematic since it overwrites the bootloader. They do not think a second and do not do even most basic testing. Just take others work (which is ok -- open source), produce crap with it to create the impression they would be busy 'developing software'
Hey, this is by intention! 'Team BPi' thinks it would be a great idea to provide OS images that can run on any of their Bananas after exchanging bootloader stuff (the bpi-bootsel crap). That's the only reason why this partition is filled with junk.
Not a single of their customers needs this 'feature'. They fulfil only their own needs and do not even think remotely about what their customers might need (at least one single working OS image and not countless crappy ones that are even self-destroying like in this case since famous 'Team BPi' simply doesn't care and never test their stuff)