These are the kinds of ganged-on responses we've come to expect from Adobe on every bug report about Premiere, followed by haughty passive-aggressive "trying to be helpful" comments from forum admins who are literally compensated by Adobe. But the screenshot proves prima facie that the bug exists, not to mention at least another forum thread alluding to the behavior in nested sequences (same thing). And that in turn presumes anyone/everyone would bother posting here, upon finding a bank vault of defense every time, anyway. I do think that the one Adobe-compensated person who tried to replicate this, didn't try hard enough. You need to have a sequence that has been converted to multicam, nested into another sequence with properly matching specs, and with all those nested UHD tracks (say, four) having Lumetri color applied. Make the thing last normally, like a multicam sequence would -- not just a minute, but many minutes. This is clearly something that happens when playback is moderately stressful (i.e., normal these days). Basically, you didn't perform a stress test at all. It is obviously no solution whatsoever that we compromise our productivity dramatically by adjusting our workflows completely to accommodate this bug. I won't be removing all color work from existing sequences, nor will I follow a dictated workflow in order to accommodate neglect by Adobe who are receiving record profits but not staffing up in equal respects: • Adobe Systems net profit by quarter 2009-2018 | Statistic Jim Simon's typical admonition, proclaiming that a good editor adjusts everything to suit Adobe's bugs, amounts to unproductive noise. That's what he's paid to say. This is not coming from an implicitly unreasonable or temperamental place; it's coming from pent-up disappointment over years of neglect in Adobe's ambitions to bloat Premiere without addressing its extraordinary, anti-consumer bugs -- combined with the way the corporation has bulked up its front lines with compensated forum apologists. They can keep banning people who express this, ignore them, and stay on course, or finally come to terms with the ubiquitous disgust in the real world that should soon lead to everyone jumping ship whenever a viable competitor finally teaches Adobe a lesson. Blackmagic is the tortoise in this hare scenario. Very exciting.
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