lsp-treemacs-call-hierarchy does not work well with lsp over tramp

[amo1962]

The command lsp-treemacs-call-hierarchy over tramp (tested with ssh and docker) shows the call hierarchy but when selecting a file it does not add the prefix for tramp, i.e. instead of opening
/ssh::/<path_to_file>
lsp-treemacs tries to open
/<path_to_file><>
Besides the missing /ssh: there is also a '<>' at the end of the file name.
The same is seen with lsp-treemacs-references and lsp-treemacs-implementations.

Is there some setting that lsp-treemacs requires to work with tramp?