Tested with Details by itself and bug occured with no other addon enabled. Tested details to compare with Recount, same bug occured in Details.

Game and Details! version
Latest version as of today for TBC

Describe the bug
Details missing spells, not accurate compared to competitor (Recount)

Tested in Multiple encounters.
Example:

Missing chain lightning in Details, while recount shows it.

- Expected (what you think the expected behavior would be when following the steps):
Should show spells being used.

- When the bug started (a date, wow path release, details update, etc)?
Just noticed today. Tested on multiple encounters. Sometimes accurate, most of the time not vs Recount.

I encountered this same issue today during some testing. I thought I was going crazy until I manually parsed the combat log myself. After manually parsing the log, I saw that Details was short a few attacks.

In one test I had 25 melee swings in my combat log in total: 9 hits, 5 misses, 5 parries, 4 dodges, and 2 crits. Details only recorded 23 in total: 9 hits, 4 misses, 4 parries, 4 dodges, 2 crits. It missed 1 parry and 1 dodge. Note that in this specific test the attacks that weren't recorded didn't deal any damage (a miss and a parry), however it can still happen to damage dealing attacks.

@Tercioo Is this something you're aware of? Seems to be a somewhat rare occurrence but still a repeating occurrence nonetheless.

Unfortunately that is not the case. From the combat log in my example, after my 5th melee attack miss and 5th melee attack parry, I then had a Bloodthirst which was parried followed by a regular melee swing which dealt damage and was the killing blow. Both of those moves were recorded by Details. I wish I had the combat log writing to a file at the time if it would have helped investigate this.