!ismi^tab does not tab complete inside function call

[felixcremer]

The tab completion of !ismis works in the plain REPL but if I try to do that after I already typed an existing function it does not work anymore.
The example is to do sum(!ismis^tab which should tab complete to sum(!ismissing) but doesn't.

This is on julia 1.11.4 and on the current nightly Commit b8dc57e (0 days old master)

[giordano]

Would be fixed by #57767 (tested locally)