Update v1.54.120.1020:

FIXES & UPDATES

The Sims 4
Invites from NPCs to social events at venues will no longer end seconds after your Sim arrives at the venue.
Sims can no longer Serenade other Sims through a wall.
Fixed an issue where venue lot types were sometimes not displaying correctly.
Walls will now show in photographs taken in basements without stairs.
Why you may have a basement without stairs is none of our business.
Take Photo Of will now work when the photo subject is lounging on a lounge chair.
No changes were made to subjects sitting in a sit chair, or laying on a lay bed.

Get Together
Toddlers no longer stretch when getting their photo taken.
Selected NPC Sims who are off lot will now come to take photos at the In a Flash Photo Studio.

Cats and Dogs
The boat at the lighthouse in Brindleton Bay now has a Travel With… interaction.
Because the boat was lonely, and wanted to travel with you.

Seasons
Sims will no longer obsessively open and close their umbrellas while walking to chat with another Sim.

Island Living
Beach Towels are now visible when the lighting is set to low settings.
Mermaids now properly pass along their genetics to the next generation.
Mermaid conservationists can now successfully survey wildlife in the ocean.
Research Conservation on the computer no longer causes every skill the Sim knows to increase rapidly.
NPC Sims from other worlds can now successfully travel with your Sim to Sulani, instead of vanishing before arrival.
NPC Sims from other dimensions still disappear prior to arriving.
Sims will no longer get stuck when other Sims are lounging on float loungers.

Multiple updates for the Off the Grid lot trait:
A new search term was added to Buy Mode, “Off the Grid”, to make finding valid items in the catalog easier.
Fish can now be added to Fish Bowls.
Sims can now clean dirty sinks that work Off the Grid
In a Flash Photo Studio no longer emits light when placed on a lot with the Off the Grid lot trait.
The following objects now work Off the Grid and/or are labeled appropriately in the catalog:
All photography cameras
Sulani Volcanic BBQ Searer
NanoCan Touchless Trash Can
Wabbit Tablet, Slablet, and Digitalistic Sketchpad
Digirad Keyboard
Fireplaces
Rocks of Fire and Roast'em and Toast'em Campfire from Outdoor Retreat
The Quadpod Grill from Toddler Stuff
Ole Timmy's WashTub from Laundry Day Stuff
Kiddie Pools from Seasons
To make caring for Pets easier the Petmate Programmatic Pet Feeder, Litter-Laser: Self-Cleaning Litter Box, and Litter-Matic Scoop Free are now battery powered

Dine Out
Random Sims will no longer steal your Sim’s food and eat it.
Restaurants now work in Sulani.