Glowing Squids and Axolotls can spawn even in bubble columns and flowing water streams.
They became a nightmare in my server after the release of that snapshot since they spawn under any water area that is higher than 2 blocks, including water elevators, pools, farms, etc.
This CAN'T be the case they have to have some restrictions in their spawning, please fix this.
Linked issues
Comments 2
Actually, it may be a duplicate of MC-222036.
Duplicate of MC-222302