When logging into an Execution server where a game is already in progress, after waiting to deploy I am immediately released onto the field as my F1 merc. I am not given the opportunity to select which merc I wish to play as before spawning (much like how all modes were as of a couple months ago).
[Game Bug] - Can't select merc on initial entry into Exec server already in progress
When the round ends that u joined are you able to join in fine the next round?
@NxA_Noxie Yep- I can select mercs on the next round just fine; it’s that initial join while a game is already in progress. My best guess is that it’s because Execution uses a different graphical UI than Objective/Stopwatch, and so that initial merc-selection gets missed.
players are not able to join in mid round. You can only join in at a start of new round. So, if you join in and round 1 has already started you will need to wait for round 2. 
hmm… then perhaps a more accurate bug description is that I’ve joined several Execution games mid-session! 
I’ve joined in matches several times and was immediately spawned as F1 merc. I’m not always able to join in progress of a match, but sometimes I join just at the right time for that to happen
@NxA_Noxie A related issue is that upon joining a mid-game Execution, my character spawns immediately, even though I’m still loading in. So my character will be standing there – effectively AFK – for ~45-60 seconds before I’m fully into the server & able to play. Quite a few times I finally get in to find I’m one of the last ones alive & there’s a Vote Kick out on me.
I believe the issue is that once you’ve hit deploy it spawns your character. I’ve spawned into a round 10 seconds late holding the bomb because my F1 was an engi and I guess I hit deploy before the round started. Meaning for that round I couldn’t choose a merc because I had already spawned.