Text Formula - Related field

Hello,

I noticed that for Text Formula, fields from Many to Many connections can not be used.
However, if it’s to one to many, then a field is used from the related table, and then it is changed back to many to many. It looks to be working.
However the equation editor content changes from “{_Test_Item _Test_Customer.Multiple Choice123}v1” to “{field_X.field_Y}v1”.
Only if I select multiple Customers in the current table will the text formula field content become “v1” without any values.

Should an Alert or some explanation come up before allowing these changes?