• Summary / Title: My ships not firing any weapons in battle. 
• Description: Suddenly and only on this turn my ships do not fire from any weapons in the battle. Enemy ships are firing and dealing damage. I started a few battles after reload - same result. On many previous turns this fleet (on Amosa) has made a bunch of battles killing a lot of enemy ships. 
• Steps to Reproduce: Start the battle on system Amosa (Fleet "TKM 3" against yellow player - Lumeris) 
• Reproducibility: 10/10 (save reload or battle card "full reserves")
• Expected Behavior: battle ends with "draw" , because my ships not dealing any damage no matter what, enemy ships cannot deliver significant damage. 
• Version: 1.5.11 S5 (all DLC and updates except Awakening)
• Notes: Battles with other fleets against enemy other fleets (Horatio systems) went normal. 
• Attachments: Save VAULT 9 (Amosa).sav

Additional comment: in many games I had played for the last year that bug never happend in vanilla version (ES2 without any expansion - supremacy/vaulters/penubra), thus I consider this issue to the new weapons/modules/designs from those expansions. 

I keep playing that save, I had have given above, and met this bug again in a battle with a pirate fleet. Both times I have solved the problem with another fleet - after the damage fail of the one fleet, I bring to that system another fleet and it is able to do damage to the same enemy in the battle. Though I haven`t figured out - what exactly causes this bug. (definetly not the main weapons, battle cards or firing arcs - I have excluded that all). Maybe medium hulls of the vaulters or some modules...

P.S. 

Actually that was the reason I had played vannilla version having all those DLC`s - there is still a lot of bugs/issues to endure and even more coming with each DLC...- all those additional features just not worth the troubles they bring to the gameplay. Mayby after a few more patches.. so, sometimes I am trying to give a chance to the full version, but that was a frustration each time I have tried - even vanilla is unfinished yet. And this bug is another confirmation.

That never happened to me. 

I tried your save and something else was weird as well. They said i could not attack a friendly fleet. So i waited a turn then i could attack. But indeed your ships did not return fire.

It works though, when you autoresolve.

Upvoted.

No answer for two weeks... It seems that devs have really abandoned this game and support is not availible anymore?

The-Cat-o-Nine-Tales wrote:

To be certain of the circumstances of the error, our programmers have asked me if you are running any mods, and if so, which ones.

At this moment there is only one mod installed - populace control. But it was not activated for this game set. I wanted to play without any mods this time. 

https://steamcommunity.com/sharedfiles/filedetails/?id=1505425416

Thank you for the response. I've passed the info to the team and am waiting for their response.

EDIT: It appears installed but deactivated mods show up in the diagnostics file. Given the amount of mods present on my system for research for the Community Spotlights, could you provide your own diagnostics file?