Jump host bug?

Hello,
another issue with jump host usage:
Sometimes, not every time, it will happen that RDM kinda connects to the server via jump host, but the session doesn't appear inside of the jump host. The session is green in the tree, other sessions from the same folder are also green, however visible, but 1-2 sessions might not appear. Sometimes happens with even the first session. There is no regularity. It is highly random and the worst thing is that I can't seem to "find" the session, thus no close it or reconnect. The only way I found to fix the issue is to completely close the jump host connection, which means closing also other sessions that were started via this specific jump host.
Any ideas why this is happening?
Thank you