Advanced (Quick) Search toolbar in each perspective where available offers one or more strictly numeric filters. In Process Instances perspective that filter is by Id, in Execution errors perspective there are more: Id, Job Id and Process Instance ID etc.

These filters allow only numeric values and only numeric values can be used to create a filter. However, when it comes to the input field, the field allows entering a limited set of non-numeric characters, whereas blocks all others.
These characters are: a, b, c, d, e, f, g, h, i, ', `
Input example:
eeeeeeeeiiiiiiiaaaaadddddfffffgggghhhh''''''''ccccccbbbbb```