The Bixby button was okay when you remapped it to something useful, but Samsung kept going out of their way to break the remapping tools. Heaven forbid people use their phones they way they want to.
I know you didn't ask but just in case you (or anyone reading this) don't know about it; Good Lock from the Samsung store. Once downloaded, you can create a routine in the settings app to reconfigure the bixby/power button to do whatever you want