Actually, it still happens:
[45130.159244] pci_pm_suspend(): hcd_pci_suspend+0x0/0x30 returns -16
[45130.159255] dpm_run_callback(): pci_pm_suspend+0x0/0x130 returns -16
[45130.159258] PM: Device 0000:00:14.0 failed to suspend async: error -16
[45130.696215] PM: Some devices failed to suspend, or early wake event detected

This may or may not caused the issue you saw later on:
[45161.989718] usb 1-7: reset full-speed USB device number 4 using xhci_hcd
[45162.117467] usb 1-7: device descriptor read/64, error -71

...which might be able to be solved by this patch series:
https://lore.kernel.org/patchwork/project/lkml/list/?series=379179

Please give it a try.

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https://bugs.launchpad.net/bugs/1799988

Title:
  Missing wifi and bluetooth after sleep on XPS 9370

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