Some doubts about Dolby P8 hope to be clarified

Previously, the Dolby Vision settings in Infuse included Auto, Limited, and Off, each with different meanings. Now, the Dolby Vision setting has been changed to On/Off. When turned off, Dolby Vision P8 will play in HDR. When turned on, for normal Dolby Vision P8.1 it will play in Dolby mode, but for non-standard Dolby Vision P8.1, will it play in pseudo Dolby mode or fall back to HDR? This is more similar to the previous Auto or Limited setting?