I don't doubt you (and I'm making this comment more so out of curiosity), but I'm shocked that you'd be considered to have a formal break in service if your EAOS came while you're at OCS. I could see if your EAOS came before reporting to OCS, but I'd imagine that you'd literally still be in the military officially while at Officer Training Command/OCS with no break in service if the reserve was true. At least that's how I'd think things would operate logically. Given that its the Navy we are talking about, though, who knows.
Note, even if what I wrote was accurate, given the uncertainty of these covid classes, I'd still opt to push your EAOS to the right some. But, if you're not worried about a paycheck and already have at least 4 years of E time to quality for O-1E pay--I knew people who reached their four years of enlisted service time while at OCS--I'd think about whether its worth it to put on extra time of service obligation (depending on how long you intend to stay commissioned).