no signature help when opening brace

[AlKa93]

I don't get any signature help any more. I used to, but some weeks ago the signature was gone. The rest of the langaue-specific features seems ok: jump-to-def, hover, completion works. To be specific: When I write out a subroutine call, the argument list is present while the actual name of the subroutine is written out. But as soon as I write the opening brace, the signature vanishes.

fortls: 1.10.2
ide-fortran: 0.4.0
Atom: 1.53.0
Electron: 6.1.12
Chrome: 76.0.3809.146
Node: 12.4.0

I'm not sure if this is actually a ide-fortran issue, but I did not find any related issue in the fortls repo. Also, I have a gif showing the behaviour read to upload, but it seems github won't let me.