Some flymake messages do not stay in the echo area

[ywwry66]

Hi there,

I am using eglot + flymake + ess + r languageserver package. I found that when using flymake-goto-next-error to navigate, there are certain linter messages that only show up in the echo area for about a second and then disappear.

For example, in a test.R buffer, with the code

foo.bar <- 1

The linter message is "lintr [object_name_linter]: Variable and function name style should match snake_case or symbols." and will not stay.

On the contrary, with the code

foo = 1

The linter message is "lintr [assignment_linter]: Use <-, not =, for assignment.", which does actually stay.

Do you know what causes the difference and how to make flymake messages always stay in the echo area? Thanks a lot🙏!