BluRay preset under H.264/NVENC produces a noncompliant output

From Vegas 18, using VK 9.3, the BluRay preset under the H.264 produces noncompliant output.

When mux is attempted (best way to test is to acquire a copy of Blu-Disc Studio-Lite, which is free) the tsMuxeR output shows an invalid picture order error message when attempting to mx/assemble the bluray disc image.

the same files output with the regular H264 preset mux flawlessly and error-free

H264 warn: Unexpected pic_order_cnt_lsb value 247. FrameNum: 107750 slice type: I_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 171. FrameNum: 107774 slice type: I_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 251. FrameNum: 107798 slice type: I_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 179. FrameNum: 107822 slice type: I_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 251. FrameNum: 107846 slice type: I_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 147. FrameNum: 107870 slice type: I_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 131. FrameNum: 107872 slice type: P_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 129. FrameNum: 107880 slice type: P_TYPE

H264 warn: Unexpected pic_order_cnt_lsb value 177. FrameNum: 107895 slice type: P_TYPE

>> Error running "C:\tsMuxeR_2.6.11\tsMuxeR.exe" "C:\Users\litz\AppData\Local\Temp\met53CF.tmp.meta" "G:\BLD-Lite Work"

Side note - is there a way to output elemental streams instead of a .mkv?

So this appears to generate compliant video:

2pass=0 aq-strength=8 aud=1 b=15000000 bluray-compat=1 bufsize=10000000 coder=cabac cq=23 gpu=0 level=4 maxrate=22000000 preset=hq profile=high qmax=29 qmin=8 rc=vbr rc-lookahead=32 spatial-aq=1 temporal-aq=1