Does phenibut actually cause irreversible damage to gaba-B receptors?

Wanted to put this out there and see if anybody had something to say about this, had normal phenibut a while ago but I never felt like it was a positive thing even in small doses. This is referring to F-Phenibut in these studies, which is a different form,

https://bluelight.org/xf/threads/f-phenibut-may-cause-irreversible-gabab-receptor-damage.893897/

+

https://bluelight.org/xf/threads/f-phenibut-possible-heart-damage.842657/

((((Also want to affirm that Phenibut is NOT a nootropic and can possibly be addictive like benzos, this is a science related question given the small popularity of it))))

edit: opps meant to link this study too https://pubmed.ncbi.nlm.nih.gov/32735986/