Hello Ismael,
I've included the inputMask 'B9.99;-' for a decimal question, using the exact same way Hector described - just trying to replicate the issue.
And I notice that leaving the question blank will not trigger the invalid warning when submitting the survey result. Does that mean this is no longer an issue and we can use inputMask for a decimal or integer question and do not need to make them 'text'?
Because I am using an inputMask (9000) for my integer question to limit the number of digits, then I remember I saw this post years ago and it seems the behavior had changed.
Cheers,
Sun