VAProfile is not supported (12) With MPEG2 playback

This is the error being logged using 2.9.0 and 2.10.0.pre2 playing an MPEG2 stream.
Any reason this is occurring and the VAAPI is not HW decoding, given that MPEG2 is listed as supported.

2020-12-02 23:31:20.528 T:1151 INFO : VAAPI::Close - closing decoder context
2020-12-02 23:31:45.200 T:3650 ERROR : VAAPI/vpp vaCreateConfig error: the requested VAProfile is not supported (12)
2020-12-02 23:31:45.206 T:3650 ERROR : VAAPI output: Postproc preinit failed

LibreELEC:~ # vainfo
libva info: VA-API version 1.10.0
libva info: Trying to open /usr/lib/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_9
libva info: va_openDriver() returns 0
vainfo: VA-API version: 1.10 (libva 2.9.1)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 20.3.0 (a837220d2a)
vainfo: Supported profile and entrypoints
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSliceLP
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSliceLP
VAProfileJPEGBaseline : VAEntrypointVLD
VAProfileJPEGBaseline : VAEntrypointEncPicture
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP
VAProfileVP8Version0_3 : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointVLD

This is on the following CPU and the LATEST Mesa
[ 0.224877] smpboot: CPU0: Intel(R) Core(TM) i5-6260U CPU @ 1.80GHz (family: 0x6, model: 0x4e, stepping: 0x3)

2020-12-02 23:31:20.528 T:1151 INFO : CRenderSystemGL::InitRenderSystem - Version: 4.6 (Core Profile) Mesa 20.2.3, Major: 4, Minor: 6
2020-12-02 23:31:20.528 T:1151 INFO : GL_RENDERER = Mesa Intel(R) Iris(R) Graphics 540 (SKL GT3)
2020-12-02 23:31:20.528 T:1151 INFO : GL_VERSION = 4.6 (Core Profile) Mesa 20.2.3

The media in question (ffprobe output) is:
Video: mpeg2video (Main), yuv420p(tv, top first), 720x576 [SAR 16:15 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc