[HTC 10 Guides, News, & Discussion] DoctorB0NG:
I have the issue as well. US Unlocked Variant running .22 Verizon Radio with Viper 1.21 and elementalX kernel.

I have an Asus RT-NT66U running the newest version of Merlin.

[93896.203275] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93898.260432] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93900.340612] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93902.396153] c3 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93904.465361] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93906.520414] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93908.598585] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93910.661684] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93913.006656] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93914.790375] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93916.854028] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93918.914461] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93928.903412] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93930.970333] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93933.625073] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93935.103502] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93943.068877] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93947.096127] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93949.092438] c2 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93951.685591] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93953.196312] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93963.765909] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93965.178807] c3 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93969.807285] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93973.223854] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93975.816338] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93986.104178] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93987.906703] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[93993.945881] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94000.007610] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94005.989882] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94012.073581] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94019.620009] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94028.289406] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94029.750403] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94031.804341] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94033.870319] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94035.923687] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94037.998226] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94040.057047] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94042.120441] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94044.177265] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94046.125896] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94048.240740] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94050.300290] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94052.359912] c2 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94054.423188] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94056.362379] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94062.912320] c2 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94082.803623] c0 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received
[94086.580190] c1 460 msm_pcie_pm_suspend: RC0: PM_Enter_L23 is received

Running the grep on dmesg with wc -l shows it appearing 122 times in the dmesg. I'm going to see if I can mess with any router settings and maybe switch to the old Verizon radio in hopes to either aggravate it worse or calm it down.

Also, it doesn't matter whether I'm on my 2.4 GHz or 5 GHz band, it has the same behavior.