Is it really any worse than Leia saying Tarkin smells, to his face?
I think the difference here is Leia using language/phrasing that is less contemporary than what Poe uses.
Yeah, she doesn’t say anything anachronistic or weird. It’d be like if she told Obi-wan in her message that she’d “catch him on the flip side” or something.
How is “I have an urgent message… about his mother” at all like “catch you on the flip side?”