format |U |L don't trigger event

I attach to a TXT_FIELD a onDataChange function. If the format of the field is blank all works fine but if I change it in |U or |L (uppercase / lowercase) the function is not triggered…

I don’t test if other format / field type / event type have the same behaviour.

Anyone can confirm so I insert the bug in the Support System?

It works correct here. Can you reproduce it in a simple solution? If you can, please create a case in the support system.

There’s already a case for this. Casenumber: 158588