What issues? F-droid seems to be going strong as fast as I can tell.
A single package not getting frequent updates could mean that package isn't being actively developed, but sometimes it just means there's no need five updates.
That kind of drama comes up in projects every now and then. If the project's fundamentals are solid, either some people leave and the project continues, or the project gets forked and the new one becomes dominant.
There was a post about this a month ago. The tldr is that one of the maintainers is arrogant and controlling so a bunch of other people quit. It wasn't out of the blue either, it's been coming for a long time. There are alternative android store options, so its not too much of a big deal
You can find older software on F-Droid which is not updated for several reasons. One reason can be that the compiling of newer versions of the software didn't work on the F-Droid compile setup. And I've read that, if uploading of newer versions is omitted for some reason, F-Droid leaves older versions of software in their repository because there are people with older Android smart phones that cannot run newer versions, and even when there would be security issues, these users are free to take the risk and use the software.
Best to ask your question on the F-Droid forum, where you can also search for answers without creating an account and where some F-Droid devs may answer : https://forum.f-droid.org/