Aspiring Lurker (He/Him)
This is the Resilient Feat per the 10th printing of the PHB:
Choose one ability score. You gain the following benefits:
• Increase the chosen ability score by 1, to a maximum of 20.
You gain proficiency in saving throws using the chosen ability.
Unless it is hidden by an Illusionary Script spell, I am not seeing verbiage indicting the is eligible to be selected more than once.
As I stated before, not being able to select a feat more than once, (unless specifically excepted), is an oft overlooked rule.
And it's not in the errata.
It's possible that someone (or some table) is interpreting, e.g., Resilient (Con) and Resilient (Wis) as different feats. That's not how I read the feat, but I can see someone interpreting it that way.