completion stops working after error about lsp-sourcekit

[wibed]

i started over and created a clean reproduction of the error:

i am typing func for function check the popup and
select the "func" option.

after the selection from the menu starts a snippet out of the full stacktrace

https://termbin.com/kwyw

in the snippet i type in the function name "hello", followed by the parentheses. as first argument i intent to write out "name", but at the second char ("na") the error pops off.

in the end it looks like this:

func hello(na)
            ^ -->> Error pops off after typing "a"

i included a follow up request for code completion, including context, in the stacktrace and the empty response thereafter.

it seems after the return message "request cancelled" with the code "-32800" the process sourcekit-lsp only provides empty responses.

this is accredited with the following error message out of stderr

2021-07-21 02:46:22.001 sourcekit-lsp[47:a15a5700] triggerFromIncompleteCompletions with incompatible completion session; expected DocumentURI(storage: \url{file:///work/cards/service/test/Sources/test/main.swift})@29, but got DocumentURI(storage: \url{file:///work/cards/service/test/Sources/test/main.swift})@35

the full stacktrace is to be found here:
https://termbin.com/0x2n

[wibed]

my assumption grows the responsibility relies on the client side for this behavior.
here is a backtrace:
https://termbin.com/5dkr

[wibed]

opened an issue on lsp-mode
emacs-lsp/lsp-mode#3028