Runner required to “get out of way” DP?

[BSBAL18]

R1 running to second on a 6-4-3 DP. Once R1 is out, is he “required” to peel away or get out of the way of the fielder making a throw to first?

Coach complained to my base Ump that the runner was out and he didn’t slide or get out of the way. He kept his line, didn’t throw hands up or verbally interfere. As PU I wasn’t in any position to see it, but wondered what NFHS has for that scenario.