Here are the patch notes.
@NF85, I'm updating your original post to include this info so folks don't have to scroll down through the rest of the comments to get to this information:
RDR2 Title Update 1.19 Notes (PS4 / Xbox One / PC / Stadia)
Created March 10, 2020Updated March 10, 2020
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[March 9, 2020] ā General / Miscellaneous (PS4 / Xbox One / PC / Stadia)
Improvements to issue with endless loading screens when performing some actions in Red Dead Online such as switching between game modes and sessions
Improvements to issues seen when pitching camps through the Player menu, resulting in a flashing prompts and an incorrect āCripps has packed up your campā alert
Fixed several networking issues that should reduce the chance of player camps being packed up during dynamic session switching in Red Dead Online
Improvements to an issue that caused pitched camps in Red Dead Online to not spawn correctly when approaching the marked blip on the Radar / Map
Fixed issues with player horses and riders being kicked off while in Posses
Fixed an issue that caused player horses to be frozen in place and unable to move when other players are nearby in a Red Dead Online session
Fixed several issues with some player horse visual attributes such as cleanliness not being correct after dismissing and re-summoning in a Red Dead Online session