v6.0 "line-gap-width": ["case", ["!", ["has", "countyCode"]], 1.2, 0.0] bug

[wqzai]

v5.24

v6.0

my config
"paint": {
"line-color": [
"case",
["all", ["has", "townCode"]],
"#fff",
["all", ["has", "countyCode"]],
"#ffa400",
["!", ["has", "countyCode"]],
"#f00056",
"#000"
],
"line-width": [
"case",
["all", ["has", "townCode"]],
1.0,
["all", ["has", "countyCode"]],
1.2,
["!", ["has", "countyCode"]],
1.4,
0.0
],
"line-gap-width": ["case", ["!", ["has", "countyCode"]], 1.2, 0.0]
}

[HarelM]

Please properly describe the issue, it's not clear from the above issue description.
There's a template for a reason...

[wqzai]

The configurations are identical, yet Version 6.0 fails to achieve the expected effect while Version 5.24 functions normally, as shown in the figure.
The original setting is that the  line-gap-width  parameter only takes effect when the  countyCode  field does not exist:
 "line-gap-width": ["case", ["!", ["has", "countyCode"]], 1.2, 0.0]

[wqzai]

The line-gap-width setting should not apply to the orange and white lines, but it takes effect in version 6.0, whereas it works correctly in version 5.24.

[HarelM]

Can you please share a jsbin with minimal reproduction?