I'm having same problems on my s9+ exynos. The black crush is more noticeable and very annoying. Hdr videos look the same as sdr and can't tell them apart. I've seen lot of people saying hdr is working fine but i think they just can't tell the difference between sdr and hdr. I've downloaded batman v superman in hdr and was hoping to get my mind blowing but when i played it on my phone it just looked similar to non-hdr version i have on my pc. Hopefully Samsung will fix this issue soon because not a lot of people use the hdr functionality as it's not yet mainstream and i think the people who do are not really watching stuff in hdr but in standard dynamic range.
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