A Redlion Data Tag which is correctly mapped is either red icon (read and write tag) or green icon (read only). See screenshot below. Flag icon denotes digital tags (boolean) and squarish/box with pi symbol denotes floating point (real numbers).
If a tag has a yellow icon, it denotes that Redlion Data Tag is not mapped, incorrectly mapped, or something is wrong.
For me it is normally due to RTU not beig defined in the Communication section.
Check yours if you are having this problem before overhauling the whole tags.