Middle Click interactions sometimes nonexistent

[Taso (DayZ) 13]

Date/Time: Random times each play session

What happened: Fairly often, I'll approach a set of doors or a ladder or a tent with the intention of climbing it or closing them, or placing loot only to find that the middle-click option doesn't exist. When I middle click or scroll wheel, the only thing that shows up is the standard option to switch weapons or ammo. This happens at all angles approached for the attempted interaction.

Where you were: Most often are ladders with examples being the ladders in the Airfield command towers and the ladders in the Apartment buildings in Chernogorsk. The tent malfunctions most often when it does not yet have any items in it.

What you were doing: Attempting to climb ladders or open/close doors or place items in a new tent. (I've never had this problem for opening doors, but I have for closing them)

*Current installed version: 1.7.1.5 and prior

*Server(s) you were on: All applicable

*Timeline of events before/after error:

After failing to interact with these objects, the option to climb ladders/close doors will often return to me after I drop items or shoot something and examine loot. The option does not return for a tent unless the tent already has items in it.

After the action being re-enabled, it will sometimes stay and sometimes leave again at seemingly random intervals.