hello and welcome. This seems to be common problem and i looked into it. The only thing i could find was a medical name. (dysgeusia)
This describes Abnormal taste or change in taste when things are described as salty, metalic, foul or rancid.

constipation, smoking, medication, antibiotics, aceinhibitors, dental issues and vitamin or mineral deficiency.

common cold, flu. strep throat, and nasal and sinus infections.
according to reliable source of which i can,t name as (it would be classed as advertising) states this usually clears on its own.

i suffer from constipation and suffer from that horrible salty taste and my medication of fentanyl can be a factor.
hope this helps in some way as its the closest ive found in research in this problem.

watch your post for other replies.