And it is a text column because they aren’t really numbers one would do some calculation with, and I need that 0 to remain there.
In another column, I applied the formula ID + ".png" but got 108.png instead of 0108.png. See gif
I worked around it by using CONCATENATE formula.
Thinking about it, maybe this is a feature (like coda trying to guess what I’m trying to achieve with the plus sign operator). But I’ll leave it here in case someone has the same problem.