Pub with three resolutions of simulcast stream some behaviors can not meet expectations

[cisco66666]

1,Environment and platform： 43mcu，ubuntu，software，chrome77 2,Reproduce step 1，pub 720p， （1080p，vga ）simulcast stream with VP9 options = { audio : true, video : [ {rid: 'q', active: true, scaleResolutionDownBy: 4.0}, {rid: 'h', active: true, scaleResolutionDownBy: 2.0}, {rid: 'f', active: true} ]} 2,sub rid Only w has one stream 213x120 3,Result analysis Rid and resolution did not meet expectations

[lzhai]

Known Chrome issue with VP9 simulcast.

[cisco66666]

Verified