RStudio server hangs for a single user on `.rs.getPackageInformation`

I've had rstudio-server running with multiple users for a while.
This week, one of the users could not log in to RStudio server. When looking at the output of ps command, it looks like it hangs on the .rs.getPackageInformation function in /usr/lib/rstudio-server/R/modules/SessionRCompletions.R.
I've tried restarting, removing the users config dir, killing the process. Nothing does the trick. It always get's hung on the same process.
I can't provide logs because I don't have access to the log files. And I can't provide sessionInfo() because I can't log into a running R process.
Thanks!