If your workload is exclusively max parallel AVX2 workloads then you probably do want to hold off a bit, yes.

For everything else, though, there doesn't seem to be any cause for concern. It's currently a single stress test in a single very specific configuration that's failing.

For reference the tests that pass:

    MemTest86 v8.3, 4 passes (~8 hours), RAM at 3466 MT/s [PASS]
    MemTestPro 7.0 (paid version of HCI MemTest), 700% (~5 hours), RAM at 3466 MT/s [PASS]
    AIDA64 6.20.5300 System Stability Test (full system test except local disks) [PASS]
    IntelBurnTest v2.54 (based on Intel Linpack), maximum stress level, all available RAM, 20 runs [PASS]
    OCCT 5.5.3 test, large data set, 64 threads, AVX2 [PASS]
    Google stressapptest 1.0.9, all available RAM [PASS]
    Prime95 v29.8 build 6 torture test, 64 threads, min/max FFT = 4K, in-place FFTs, AVX2 (~1 hour) [PASS]
    Prime95, min/max FFT = 8K, in-place FFTs, AVX2 [PASS]
    Prime95, min/max FFT = 16K, in-place FFTs, without AVX2 [PASS]

The tests that fail:

    Prime95, min/max FFT = 16K (in-place FFTs or not), with AVX2 [INSTANT FAIL]

Note that an AVX2 workload is both in the passing & failing camp. So it's not as clear cut as "AVX2 doesn't work"