Whenever I place a catwalk it's placed twice usually above the first one placed, also it gets consumed in creative. Don't think its connected to the new create update cause it was already doing that before the update
I have some other mods installed:

bettercombat-forge-1.7.0+1.19.jar
Architects-Palette-1.19.2-1.3.2.jar
architectury-6.5.85-forge.jar
AutoRegLib-1.8.2-55.jar
blueprint-1.19.2-6.1.2.jar
BuildingBlocksOverhaul-v2.2.6-B-Forge1.19.2.jar
caelus-forge-1.19.2-3.0.0.6.jar
catalogue-1.7.0-1.19.2.jar
clayworks-1.19.2-2.0.1.jar
cloth-config-8.2.88-forge.jar
combatroll-forge-1.1.5+1.19.jar
configured-2.1.1-1.19.2.jar
create-1.19.2-0.5.1.b.jar
createaddition-1.19.2-20230527a.jar
create_enchantment_industry-1.19.2
create_crystal_clear-0.2.1-1.19.2.jar
extendedgears-2.0.2-1.19.2-0.5.0.iforge-1.19.2.jar
curios-forge-1.19.2-5.1.4.1.jar
Decorative Blocks-forge-1.19.2-3.0.0.jar
effortlessbuilding-1.19-2.40.jar
Essential-forge_1-18-2.jar
forbidden_arcanus-1.19.2-2.1.3.jar
geckolib-forge-1.19-3.1.40.jar
homespun-1.19.2-0.5.1.jar
irons_spellbooks-1.19.2-1.1.3.jar
jei-1.19.2-forge-11.6.0.1015.jar
littlecontraptions-forge-1.19.2.2.jar
littlelogistics-mc1.19.2-v1.4.0.jar
player-animation-lib-forge-1.0.2.jar
polymorph-forge-0.46.1+1.19.2.jar
Quark-3.4-402.jar
sculpt-1.19.2-forge-v3.jar
torchblocktastic-0.4-1.19.2.jar
The_Graveyard_2.5.3_(FORGE)_for_1.19.2..jar
twigs-forge-1.19.2-3.0.1.jar
valhelsia_core-forge-1.19.2-0.5.0.jar

Confirmed on my end on 1.3.3 for 1.19.2. Catwalks are automatically placed when mousing over any block that uses the extended placement rules like Shafts (from Create iteself), Catwalk Stairs, Supports, and ofc other Catwalks.

I can add that my server and client are also experiencing this issue.
Catwalks will automatically place if they're selected in the hotbar, being 'consumed' until affected by a block update on the client's world, in which case they will return to the player inventory once they update said inventory.
Amusingly, these do have collision but can get players kicked if Flying protection is enabled. On my server where such protections are disabled, I was able to witness a player climbing nothing as they attempted to replicate this bug.

Modlist

advdebug-2.3.0.jar
aileron-1.19-fabric-1.0.2.jar
architectury-6.5.85-fabric.jar
auditory-0.0.4-1.19.x.jar
bclib-2.1.7.jar
BeaconOverhaul-1.7.3+1.19.2.jar
better-end-2.1.6.jar
better-nether-7.1.4.jar
BiomeParticleWeather-v4.0.5-1.19.2-Fabric.jar
borderless-mining-1.1.5+1.19.jar
cardinal-components-api-5.0.2.jar
carpet-fixes-1.19-1.12.2.jar
charm-fabric-1.19.2-4.4.4.jar
cloth-config-8.2.88-fabric.jar
collective-1.19.2-6.62.jar
coloredglowlib-2.0.1+fabric_1.19.2.jar
continuity-2.0.2+1.19.jar
CosmeticArmor-1.19-1.4.2.jar
crawl-0.11.1.jar
create-fabric-0.5.1-b-build.1079+mc1.19.2.jar
createchunkloading-1.5.0-fabric.jar
createdeco-1.3.3-1.19.2.jar
ctov-3.2.4.jar
customizableelytra-fabric-1.6.4-1.19.jar
Debugify-2.8.0.jar
deeperdarker-fabric-1.1.6-fabric.jar
DistantHorizons-1.6.9a-1.19.2.jar
dynamiccrosshair-5.6.2+1.19.2-fabric.jar
enchant-the-rainbow-1.1.0+1.19.jar
Entity_Collision_FPS_Fix-fabric-1.19-2.0.0.0.jar
fabric-api-0.76.0+1.19.2.jar
fabric-carpet-1.19.2-1.4.84+v221018.jar
fabric-seasons-2.2.1+1.19.jar
fallingleaves-1.13.0+1.19.2.jar
FallingTree-1.19.2-3.10.0.jar
ferritecore-5.0.3-fabric.jar
figura-0.1.0+1.19.2.jar
fluidlogged-1.2.0-fabric-mc1.19.jar
ForgeConfigAPIPort-v4.2.11-1.19.2-Fabric.jar
frame-0.26.1+1.19-fabric.jar
geckolib-fabric-1.19-3.1.40.jar
goml-1.6.4+1.19.2.jar
Iceberg-1.19.1-fabric-1.0.46.jar
ImmediatelyFast-1.1.12+1.19.jar
immersive_armors-1.5.5+1.19.2-fabric.jar
immersive_weathering-1.19.2-1.2.9-fabric.jar
imperishable-items-fabric-mc1.19-3.0.0.jar
indium-1.0.9+mc1.19.2.jar
inventorytotem-1.19.2-3.0.jar
ITO-1.02.jar
jei-1.19.2-fabric-11.6.0.1015.jar
lazydfu-0.1.3.jar
LegendaryTooltips-1.19.2-fabric-1.3.3.jar
lithium-fabric-mc1.19.2-0.11.1.jar
memoryleakfix-fabric-1.17+-1.0.0.jar
minelib11-0.1.3+1.19.jar
modmenu-4.1.2.jar
moonlight-1.19.2-2.2.40-fabric.jar
moreculling-1.19.1-0.17.0.jar
mousewheelie-1.11.1+mc1.19.2.jar
NoChatReports-FABRIC-1.19.2-v1.13.12.jar
Prism-1.19.2-fabric-1.0.3.jar
recipe-book-is-pain-0.9.3-1.19.2.jar
reeses_sodium_options-1.4.9+mc1.19.2-build.67.jar
rubidium-0.5.6.jar
runic_enchanting-1.0.jar
ShowMeWhatYouGot-1.19.2-1.0.3.jar
slimyfloor-1.19.1-1.2.5.jar
smoothboot-fabric-1.19-1.7.1.jar
sodium-extra-0.4.16+mc1.19.2-build.90.jar
sodium-fabric-mc1.19.2-0.4.4+build.18.jar
soundphysics-fabric-1.19.2-1.0.18.jar
starlight-1.1.1+fabric.ae22326.jar
stoneholm-1.4.4.jar
transparentarmor-0.0.2-1.19.jar
trinkets-3.4.2.jar
twigs-3.0.0-fabric-1.19.2.jar
twilightforest-fabric-1.19.2-4.2.357.jar
voicechat-fabric-1.19.2-2.4.11.jar
wolves-with-armor-1.8.0-1.19.jar
woof-3.0.0-1.19.jar
WWOO-FABRIC-3.1.9.1.jar
YungsApi-1.19.2-Fabric-3.8.9.jar
YungsBetterDesertTemples-1.19.2-Fabric-2.2.2.jar
YungsBetterMineshafts-1.19.2-Fabric-3.2.0.jar
YungsBetterNetherFortresses-1.19.2-Fabric-1.0.5.jar
YungsBetterOceanMonuments-1.19.2-Fabric-2.1.0.jar
YungsBetterStrongholds-1.19.2-Fabric-3.2.0.jar
YungsBetterWitchHuts-1.19.2-Fabric-2.1.0.jar
YungsBridges-1.19.2-Fabric-3.1.0.jar
YungsExtras-1.19.2-Fabric-3.1.0.jar

Confirmed on my end on 1.3.3 for 1.19.2. Catwalks are automatically placed when mousing over any block that uses the extended placement rules like Shafts (from Create iteself), Catwalk Stairs, Supports, and ofc other Catwalks.

Personally it does that to me without ever hovering extended placement blocks.. Just over anything. Probably an incompatibility, ouch.