Welcome to the community @vpigolenko!
Nice find. It seems like this attribute is broken. I made a Decimal column and Integer column, but I’m able to type in whatever number I want under both column. No formatting changes. My Decimal column has the precision set to more than a few digits but nothing happens to the number typed in. Current state: I type in 1 and it should automatically change to 1.0000.
You can trick the system to switch between Decimal and Integer by making your switch in the dropdown and changing a setting under precision or toggling on/off negatives. Infinity isn’t recognizing a change when you do a simple dropdown switch, but it will recognize the change once you mess with the other settings. Unfortunately, it’s still broken.