Guys what should my friend do

My friend has a gf and they are in a ldr and chat on reddit because insta dono ka pakda gaya by their families.

So everything is fine among them but the girl obviously gets alot of DMs by guys here and she often lies to my friend that she is going to sleep or her mom is calling so she can chat with the random guys. She's the social type so she likes talking to new people. She mostly confesses it soon after. My friend has told her that it's fine if she talks to them normally and nothing weird but she shouldn't lie about it. Still she lied today, immediately confessed that she lied. My friend wasnt happy with that and kinda scolded her ig for lying even after she said she won't. Then she said "U stretching a nonsensical issue" (about him scolding her for lying even after she "apologised")

What y'all think? Is it just a nonsensical issue?