Not when disconnecting, only the classic spark when connecting
The gnd bat terminal, in my case the amps ground since I do not like disconnecting the battery because I always loose the HU's saved stations and audio settings.

I disconnect the amps gnd( no spark ) then remove the anl fuse to cut Power to the amps to replace or test others

Then the reverse steps fuse and gnd ( key is always on off pos or not on)

Even swapping the gnd or fuse order always a pop spark
It's a common thing. Isn't it?