Bossk

I've seen this reported before, but I have not the ability to test it out myself since there is no split screen possible on PC.

You're indeed right this should be fixed. Hopefully, they give arcade some love in the future. I hope to see private matches added as well.

Well, it was gone, but now it's back.

Don't expect some Arcade love

Some how it got fixed. However, it's back now.

When I say enemies can see the outline, I mean the other player. Even though they are on the other team.

This is an issue with Arcade Splitscreen forever. The instances you might have not seen it are probably bugs. These markers oftenly bug out both in Arcade and Multiplayer alike, one famous example is the yellow outline on allies after using the Officer's Command ability which should always appear on affected allies after the use of the skill but frequently bugs and shows nothing.

Most effects are shared between players in Splitscreen, but some aren't. What makes devs decide which ones do and which ones don't is beyond me, none should be shared.

But expecting Arcade Love is naive. Devs rarely ever go fix arcade issues. Maybe one day. Maybe if you get a lot of attention to this issue they'll have to fix it.

Aside from that there's nothing I can do to help move up this issue in their priority list

Yeah, I know. It's sad that it doesn't get more attention. I still report the bugs anyway. Incase, maybe, it will be seen.   

@JKTJH_sny4_play 
Please keep doing this! In no way take my comment as a reason to stop doing this. But I understand those who can't stand what DICE has been doing here. I myself rarely play this game anymore, but I stay here reporting and helping other reports because not only I want to get better with BUG hunting, but also because I won't let them deliver this half-game half-BUG for full price and get out with it like it was a success.

This is one example of many in EA's library, however this is the only one about Star Wars (SWBF2015 is dead, and Fallen Order didn't interest me by the trailer). The rest I couldn't care less. I even play Apex Legends, which is HUGELY superior to this game in terms of BUGs and bugfixing, but I don't bother with those even when I stumble upon them (and of course I already found several BUGs there too, but they are usually quickly patched). You'll never find me in Apex Legend's page in Answers HQ.

I know arcade isn't a priority, but can we please get some fixes for it at some point.

I know that this is old and I don't expect it to ever be fixed, but I'm going to put this here just in case.