SHOW TAG VALUES FROM "measurement 1 " with key = "key1" where "key2" =~ "$key2_values$" will still return all key1 values

1

Line Protocol as below

measurement 1 key1=xxxxx, key2 =xxxx…

I create 2 variables for my dashboard

variable 1 = SHOW TAG VALUES FROM "measurement 1 " with key = “key2” (It is no problems)

variable 2 = SHOW TAG VALUES FROM "measurement 1 " with key = “key1” where “key2” =~ “$key2_values$” from the selection of variable1. However, I found it still list all the key1 values no matter without the key2 or the key2 is not matching the selection from variable 1

variable 1 is a global tag defined in telegraf influxdb agent file. Because I found it works with another key which if I try hardcode it in the query

Any trick for that ?